linaro-kernel October 2013

linaro-kernel@lists.linaro.org

87 participants
222 discussions

[PATCH] regulator: core: Always warn when using a dummy regulator

by Mark Brown

From: Mark Brown <broonie(a)linaro.org> This helps people spot if they have missed a supply from a device tree or equivalent data structure. Suggested-by: Stephen Warren <swarren(a)nvidia.com> Signed-off-by: Mark Brown <broonie(a)linaro.org> --- drivers/regulator/core.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 6333080..13263d1 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1299,13 +1299,8 @@ static struct regulator *_regulator_get(struct device *dev, const char *id, * even if it isn't hooked up and just provide a dummy. */ if (has_full_constraints && allow_dummy) { - /* - * Log the substitution if regulator configuration is - * not complete to help development. - */ - if (!has_full_constraints) - pr_warn("%s supply %s not found, using dummy regulator\n", - devname, id); + pr_warn("%s supply %s not found, using dummy regulator\n", + devname, id); rdev = dummy_regulator_rdev; goto found; -- 1.8.4.rc3

12 years

linus/master boot: 24 pass, 5 fail (v3.12-rc3-296-g15c83d2)

by Kevin Hilman build bot

Automated DT boot report for various ARM defconfigs. Boot test simply checks if kernel can boot to initramfs with busybox and run some basic commands (e.g. 'cat /proc/cpuinfo'). Tree/Branch: linus/master Git describe: v3.12-rc3-296-g15c83d2 Commit: 15c83d26e1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse Failed boot tests (console logs at the end) =========================================== omap3-tobi,3530overo: FAIL: arm-omap2plus_defconfig omap3-tobi,3730storm: FAIL: arm-omap2plus_defconfig omap3-tobi,3530overo: FAIL: arm-multi_v7_defconfig omap3-tobi,3730storm: FAIL: arm-multi_v7_defconfig exynos5250-arndale: FAIL: arm-exynos_defconfig Full Report =========== arm-tegra_defconfig ------------------- tegra30-beaver PASS: 0 min 17.3 sec arm-omap2plus_defconfig ----------------------- am335x-boneblack PASS: 0 min 30.3 sec omap3-beagle-xm PASS: 0 min 52.5 sec am335x-bone PASS: 0 min 26.3 sec omap3-tobi,3530overo FAIL: 1 min 12.3 sec omap4-panda PASS: 1 min 7.0 sec omap4-panda-es PASS: 1 min 6.8 sec omap3-tobi,3730storm FAIL: 0 min 27.4 sec omap3-beagle PASS: 0 min 50.7 sec arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual PASS: 0 min 16.3 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.2 sec imx6q-wandboard PASS: 0 min 14.9 sec arm-multi_v7_defconfig ---------------------- tegra30-beaver PASS: 0 min 16.8 sec am335x-boneblack PASS: 0 min 34.6 sec omap3-beagle-xm PASS: 0 min 48.9 sec armada-370-mirabox PASS: 0 min 20.2 sec omap4-panda PASS: 1 min 0.8 sec omap4-panda-es PASS: 1 min 7.5 sec sun4i-a10-cubieboard PASS: 0 min 14.5 sec imx6dl-wandboard,wand-solo PASS: 0 min 16.7 sec omap3-tobi,3530overo FAIL: 1 min 10.5 sec am335x-bone PASS: 0 min 33.4 sec imx6q-wandboard PASS: 0 min 15.9 sec omap3-tobi,3730storm FAIL: 0 min 27.4 sec imx6dl-wandboard,wand-dual PASS: 0 min 16.8 sec omap3-beagle PASS: 0 min 56.5 sec arm-exynos_defconfig -------------------- exynos5250-arndale FAIL: 0 min 31.4 sec arm-mvebu_defconfig ------------------- armada-370-mirabox PASS: 0 min 19.9 sec arm-sama5_defconfig ------------------- sama5d35ek PASS: 0 min 18.7 sec Console logs for failures ========================= arm-omap2plus_defconfig ----------------------- omap3-tobi,3530overo: FAIL: last 24 lines of boot log: ------------------------------------------------------ Ove before (last 100 chars): = 4153680 (3f6150 hex) Ove after: <class 'pexpect.TIMEOUT'> match: None match_index: None exitstatus: None flag_eof: False pid: 19066 child_fd: 3 closed: False timeout: 30 delimiter: <class 'pexpect.EOF'> logfile: <open file 'boot-omap3-tobi,3530overo.log', mode 'w' at 0x7f56f999ced0> logfile_read: None logfile_send: None maxread: 2000 ignorecase: False searchwindowsize: None delaybeforesend: 0.05 delayafterclose: 0.1 delayafterterminate: 0.1 # PYBOOT: Time: 72.28 seconds. # PYBOOT: Result: FAIL omap3-tobi,3730storm: FAIL: last 24 lines of boot log: ------------------------------------------------------ setenv netargs 'setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}::::192.168.1.254:none' Overo # if test -n ${initenv}; then run initenv; fi if test -n ${initenv}; then run initenv; fi Overo #if test -n ${preboot}; then run preboot; fi if test -n ${preboot}; then run preboot; fi Overo # setenv autoload no; setenv autoboot no setenv autoload no; setenv autoboot no Overo # dhcp dhcp smc911x: detected LAN9221 controller smc911x: autonegotiation timed out smc911x: MAC 00:15:c9:28:f0:11 BOOTP broadcast 1 BOOTP broadcast 2 BOOTP broadcast 3 BOOTP broadcast 4 BOOTP broadcast 5 Retry count exceeded; starting again smc911x: detected LAN9221 controller ~$off # PYBOOT: Exception: u-boot: ERROR: DHCP retry count exceeded. # PYBOOT: Time: 27.36 seconds. # PYBOOT: Result: FAIL arm-multi_v7_defconfig ---------------------- omap3-tobi,3530overo: FAIL: last 24 lines of boot log: ------------------------------------------------------ / # uname -r uname -r 3.12.0-rc3-00296-g15c83d2 / # cat /proc/cpuinfo cat /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 3 (v7l) Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpd32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x1 CPU part : 0xc08 CPU revision : 3 Hardware : Generic OMAP3 (Flattened Device Tree) Revision : 0000 Serial : 0000000000000000 / # ip -f inet -o addr ip -f inet -o addr 1: lo inet 127.0.0.1/8 scope host lo\ valid_lft forever preferred_lft forever /~$off # PYBOOT: Exception: ERROR: Timeout waiting for command: ip -f inet -o addr. # PYBOOT: Time: 70.47 seconds. # PYBOOT: Result: FAIL omap3-tobi,3730storm: FAIL: last 24 lines of boot log: ------------------------------------------------------ setenv netargs 'setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}::::192.168.1.254:none' Overo # if test -n ${initenv}; then run initenv; fi if test -n ${initenv}; then run initenv; fi Overo # if test -n ${preboot}; then run preboot; fi if test -n ${preboot}; then run preboot; fi Overo # setenv autoload no; setenv autoboot no setenv autoload no; setenv autoboot no Overo # dhcp dhcp smc911x: detected LAN9221 controller smc911x: autonegotiation timed out smc911x: MAC 00:15:c9:28:f0:11 BOOTP broadcast 1 BOOTP broadcast 2 BOOTP broadcast 3 BOOTP broadcast 4 BOOTP broadcast 5 Retry count exceeded; starting again smc911x: detected LAN9221 controller ~$off # PYBOOT: Exception: u-boot: ERROR: DHCP retry count exceeded. # PYBOOT: Time: 27.36 seconds. # PYBOOT: Result: FAIL arm-exynos_defconfig -------------------- exynos5250-arndale: FAIL: last 24 lines of boot log: ---------------------------------------------------- Connected to arndale console [channel connected] (~$quit to exit) (user:khilman) is already connected ~$hardreset Command(arndale console)> hardreset (user:jenkins) Reboot arndale Reboot: arndale ; phidget 2 0 : off, sleep, on ~$off # PYBOOT: Exception: ERROR: Could not break into autoboot. # PYBOOT: Time: 31.45 seconds. # PYBOOT: Result: FAIL

12 years

[RFC] ARM: lockless get_user_pages_fast()

by Zi Shen Lim

Futex uses GUP. Currently on ARM, the default __get_user_pages_fast being used always returns 0, leading to a forever loop in get_futex_key :( Implementing GUP solves this problem. Tested on vexpress-A15 on QEMU. 8<---------------------------------------------------->8 Implement get_user_pages_fast without locking in the fastpath on ARM. This work is derived from the x86 version and adapted to ARM. Signed-off-by: Zi Shen Lim <zishen.lim(a)linaro.org> --- arch/arm/mm/Makefile | 4 +- arch/arm/mm/gup.c | 330 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 332 insertions(+), 2 deletions(-) create mode 100644 arch/arm/mm/gup.c diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile index 224a9cc..26cafd0 100644 --- a/arch/arm/mm/Makefile +++ b/arch/arm/mm/Makefile @@ -2,8 +2,8 @@ # Makefile for the linux arm-specific parts of the memory manager. # -obj-y := dma-mapping.o extable.o fault.o init.o \ - iomap.o +obj-y := dma-mapping.o extable.o fault.o gup.o \ + init.o iomap.o obj-$(CONFIG_MMU) += fault-armv.o flush.o idmap.o ioremap.o \ mmap.o pgd.o mmu.o diff --git a/arch/arm/mm/gup.c b/arch/arm/mm/gup.c new file mode 100644 index 0000000..42dce08 --- /dev/null +++ b/arch/arm/mm/gup.c @@ -0,0 +1,330 @@ +/* + * Lockless get_user_pages_fast for ARM + * + * Copyright (C) 2008 Nick Piggin + * Copyright (C) 2008 Novell Inc. + * Copyright (C) 2013 Zi Shen Lim, Linaro Ltd <zishen.lim(a)linaro.org> + */ +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/vmstat.h> +#include <linux/highmem.h> +#include <linux/swap.h> +#include <linux/hugetlb.h> + +#include <asm/pgtable.h> + +static inline pte_t gup_get_pte(pte_t *ptep) +{ + return ACCESS_ONCE(*ptep); +} + +/* + * The performance critical leaf functions are made noinline otherwise gcc + * inlines everything into a single function which results in too much + * register pressure. + */ +static noinline int gup_pte_range(pmd_t pmd, unsigned long addr, + unsigned long end, int write, struct page **pages, int *nr) +{ + pte_t *ptep; + + ptep = pte_offset_map(&pmd, addr); + do { + pte_t pte = gup_get_pte(ptep); + struct page *page; + + if (!pte_present_user(pte) || (write && !pte_write(pte)) || + pte_special(pte)) { + pte_unmap(ptep); + return 0; + } + VM_BUG_ON(!pfn_valid(pte_pfn(pte))); + page = pte_page(pte); + get_page(page); + SetPageReferenced(page); + pages[*nr] = page; + (*nr)++; + + } while (ptep++, addr += PAGE_SIZE, addr != end); + pte_unmap(ptep - 1); + + return 1; +} + +static inline void get_head_page_multiple(struct page *page, int nr) +{ + VM_BUG_ON(page != compound_head(page)); + VM_BUG_ON(page_count(page) == 0); + atomic_add(nr, &page->_count); + SetPageReferenced(page); +} + +static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr, + unsigned long end, int write, struct page **pages, int *nr) +{ + pte_t pte = *(pte_t *)&pmd; + struct page *head, *page; + int refs; + + if (!pte_present_user(pte) || (write && !pte_write(pte))) + return 0; + /* hugepages are never "special" */ + VM_BUG_ON(pte_special(pte)); + VM_BUG_ON(!pfn_valid(pte_pfn(pte))); + + refs = 0; + head = pte_page(pte); + page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT); + do { + VM_BUG_ON(compound_head(page) != head); + pages[*nr] = page; + if (PageTail(page)) + get_huge_page_tail(page); + (*nr)++; + page++; + refs++; + } while (addr += PAGE_SIZE, addr != end); + get_head_page_multiple(head, refs); + + return 1; +} + +static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, + int write, struct page **pages, int *nr) +{ + unsigned long next; + pmd_t *pmdp; + + pmdp = pmd_offset(&pud, addr); + do { + pmd_t pmd = *pmdp; + + next = pmd_addr_end(addr, end); + /* + * The pmd_trans_splitting() check below explains why + * pmdp_splitting_flush has to flush the tlb, to stop + * this gup-fast code from running while we set the + * splitting bit in the pmd. Returning zero will take + * the slow path that will call wait_split_huge_page() + * if the pmd is still in splitting state. gup-fast + * can't because it has irq disabled and + * wait_split_huge_page() would never return as the + * tlb flush IPI wouldn't run. + */ + if (pmd_none(pmd) || pmd_trans_splitting(pmd)) + return 0; + if (unlikely(pmd_huge(pmd))) { + if (!gup_huge_pmd(pmd, addr, next, write, pages, nr)) + return 0; + } else { + if (!gup_pte_range(pmd, addr, next, write, pages, nr)) + return 0; + } + } while (pmdp++, addr = next, addr != end); + + return 1; +} + +static noinline int gup_huge_pud(pud_t pud, unsigned long addr, + unsigned long end, int write, struct page **pages, int *nr) +{ + pte_t pte = *(pte_t *)&pud; + struct page *head, *page; + int refs; + + if (!pte_present_user(pte) || (write && !pte_write(pte))) + return 0; + /* hugepages are never "special" */ + VM_BUG_ON(pte_special(pte)); + VM_BUG_ON(!pfn_valid(pte_pfn(pte))); + + refs = 0; + head = pte_page(pte); + page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT); + do { + VM_BUG_ON(compound_head(page) != head); + pages[*nr] = page; + if (PageTail(page)) + get_huge_page_tail(page); + (*nr)++; + page++; + refs++; + } while (addr += PAGE_SIZE, addr != end); + get_head_page_multiple(head, refs); + + return 1; +} + +static int gup_pud_range(pgd_t pgd, unsigned long addr, unsigned long end, + int write, struct page **pages, int *nr) +{ + unsigned long next; + pud_t *pudp; + + pudp = pud_offset(&pgd, addr); + do { + pud_t pud = *pudp; + + next = pud_addr_end(addr, end); + if (pud_none(pud)) + return 0; + if (unlikely(pud_huge(pud))) { + if (!gup_huge_pud(pud, addr, next, write, pages, nr)) + return 0; + } else { + if (!gup_pmd_range(pud, addr, next, write, pages, nr)) + return 0; + } + } while (pudp++, addr = next, addr != end); + + return 1; +} + +/* + * Like get_user_pages_fast() except its IRQ-safe in that it won't fall + * back to the regular GUP. + */ +int __get_user_pages_fast(unsigned long start, int nr_pages, int write, + struct page **pages) +{ + struct mm_struct *mm = current->mm; + unsigned long addr, len, end; + unsigned long next; + unsigned long flags; + pgd_t *pgdp; + int nr = 0; + + start &= PAGE_MASK; + addr = start; + len = (unsigned long) nr_pages << PAGE_SHIFT; + end = start + len; + if (unlikely(!access_ok(write ? VERIFY_WRITE : VERIFY_READ, + (void __user *)start, len))) + return 0; + + /* + * XXX: batch / limit 'nr', to avoid large irq off latency + * needs some instrumenting to determine the common sizes used by + * important workloads (eg. DB2), and whether limiting the batch size + * will decrease performance. + * + * It seems like we're in the clear for the moment. Direct-IO is + * the main guy that batches up lots of get_user_pages, and even + * they are limited to 64-at-a-time which is not so many. + */ + /* + * This doesn't prevent pagetable teardown, but does prevent + * the pagetables and pages from being freed. + * + * So long as we atomically load page table pointers versus teardown, + * we can follow the address down to the the page and take a ref on it. + */ + local_irq_save(flags); + pgdp = pgd_offset(mm, addr); + do { + pgd_t pgd = *pgdp; + + next = pgd_addr_end(addr, end); + if (pgd_none(pgd)) + break; + if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + break; + } while (pgdp++, addr = next, addr != end); + local_irq_restore(flags); + + return nr; +} + +/** + * get_user_pages_fast() - pin user pages in memory + * @start: starting user address + * @nr_pages: number of pages from start to pin + * @write: whether pages will be written to + * @pages: array that receives pointers to the pages pinned. + * Should be at least nr_pages long. + * + * Attempt to pin user pages in memory without taking mm->mmap_sem. + * If not successful, it will fall back to taking the lock and + * calling get_user_pages(). + * + * Returns number of pages pinned. This may be fewer than the number + * requested. If nr_pages is 0 or negative, returns 0. If no pages + * were pinned, returns -errno. + */ +int get_user_pages_fast(unsigned long start, int nr_pages, int write, + struct page **pages) +{ + struct mm_struct *mm = current->mm; + unsigned long addr, len, end; + unsigned long next; + pgd_t *pgdp; + int nr = 0; + + start &= PAGE_MASK; + addr = start; + len = (unsigned long) nr_pages << PAGE_SHIFT; + + end = start + len; + if (end < start) + goto slow_irqon; + + /* + * XXX: batch / limit 'nr', to avoid large irq off latency + * needs some instrumenting to determine the common sizes used by + * important workloads (eg. DB2), and whether limiting the batch size + * will decrease performance. + * + * It seems like we're in the clear for the moment. Direct-IO is + * the main guy that batches up lots of get_user_pages, and even + * they are limited to 64-at-a-time which is not so many. + */ + /* + * This doesn't prevent pagetable teardown, but does prevent + * the pagetables and pages from being freed. + * + * So long as we atomically load page table pointers versus teardown, + * we can follow the address down to the the page and take a ref on it. + */ + local_irq_disable(); + pgdp = pgd_offset(mm, addr); + do { + pgd_t pgd = *pgdp; + + next = pgd_addr_end(addr, end); + if (pgd_none(pgd)) + goto slow; + if (!gup_pud_range(pgd, addr, next, write, pages, &nr)) + goto slow; + } while (pgdp++, addr = next, addr != end); + local_irq_enable(); + + VM_BUG_ON(nr != (end - start) >> PAGE_SHIFT); + return nr; + + { + int ret; + +slow: + local_irq_enable(); +slow_irqon: + /* Try to get the remaining pages with get_user_pages */ + start += nr << PAGE_SHIFT; + pages += nr; + + down_read(&mm->mmap_sem); + ret = get_user_pages(current, mm, start, + (end - start) >> PAGE_SHIFT, write, 0, pages, NULL); + up_read(&mm->mmap_sem); + + /* Have to be a bit careful with return values */ + if (nr > 0) { + if (ret < 0) + ret = nr; + else + ret += nr; + } + + return ret; + } +} -- 1.8.1.2

12 years

[PATCH 0/3] KVM/ARM Huge pages support

by Christoffer Dall

This small series adds support for Transparent Huge Pages and hugetlbfs pages for KVM on the arm and arm64 architectures. Measurements have shown that using huge pages in for stage-2 mappings provides up to more than 15% performance increase for some workloads. The patch series applies to kvm/next, but depends on the patch sent earlier: "ARM: KVM: Fix unaligned unmap_range leak" Christoffer Dall (3): KVM: Move gfn_to_index to x86 specific code KVM: ARM: Get rid of KVM_HPAGE_XXX defines KVM: ARM: Transparent huge pages and hugetlbfs support arch/arm/include/asm/kvm_host.h | 5 - arch/arm/include/asm/kvm_mmu.h | 17 +++- arch/arm/kvm/mmu.c | 200 ++++++++++++++++++++++++++++++++------ arch/arm64/include/asm/kvm_mmu.h | 12 ++- arch/x86/include/asm/kvm_host.h | 7 ++ include/linux/kvm_host.h | 7 -- 6 files changed, 201 insertions(+), 47 deletions(-) -- 1.7.10.4

12 years

[PATCH 000/228] CPUFreq: cleanup stuff for 3.13

by Viresh Kumar

This is my biggest patchset ever and it might not happen again in my entire career. I hope I haven't screwed up here :) CPUFreq cleanup patches are ready to hit linux-next (I hope it doesn't turn out into horror stories, where it broke all possible architectures where Linux runs :)) Most of these are build tested only, Also done by: Fengguang Wu's build bot. All of these were sent separately in smaller patchsets earlier and now merged together as a single set. Some parts are reviewed by platform maintainers and their Acks are included in the patches (Sorry if I missed any).. These are rebased over today's pm/linux-next: f74a274 Merge branch 'pm-cpufreq-next' into linux-next with following patches over it, which I expect to get into Rafael's tree before these: cpufreq: use correct values of cpus in __cpufreq_remove_dev_finish() cpufreq: distinguish drivers that do asynchronous notifications cpufreq: make sure frequency transitions are serialized cpufreq: Create cpufreq_transition_complete() cpufreq: powernow-k8: mark freq transition complete on error cases There are few new patches here which haven't been sent yet and only came out after discussions with Maintainers about their platforms: cpufreq: loongson2: use cpufreq_generic_init() routine cpufreq: davinci: use cpufreq_generic_init() routine cpufreq: cris: use cpufreq_generic_init() routine cpufreq: omap: use cpufreq_generic_init() routine As suggested by Rafael earlier, he might not apply all at once and will give people some chance to test sets one by one.. So, first set now, next one after few days. So, I am marking different sets with patch numbers to make it easier for Rafael. - Patch 1->8: Generic cleanup of cpufreq core (First batch) - Patch 9->54: Mostly about cpufreq_table_validate_and_show() helper (First batch) - Patch 55->89: New generic routines for cpufreq drivers (First/Second batch) - Patch 90->126: About calling cpufreq_driver->get() from core (First/Second batch) - Patch 127->146: Generic init() routine (First/Second batch) - Patch 147->180: Light weight ->target() routine (Third batch) - Patch 181->211: Call notifiers from core instead of target() (Third/Fourth batch) - Patch 212->228: Generic get() (Fifth batch) As suggested by Amit here, Linaro may try to test linux-next with these patches on Linaro's board farm (Mostly ARM and X86).. https://lkml.org/lkml/2013/9/11/346 -- viresh Hans-Christian Egtvedt (1): cpufreq: at32ap: add frequency table Viresh Kumar (227): cpufreq: Remove extra blank line cpufreq: don't break string in print statements cpufreq: remove __cpufreq_remove_dev() cpufreq: Optimize cpufreq_frequency_table_verify() cpufreq: rename __cpufreq_set_policy() as cpufreq_set_policy() cpufreq: rewrite cpufreq_driver->flags using shift operator cpufreq: use cpufreq_driver->flags to mark CPUFREQ_HAVE_GOVERNOR_PER_POLICY cpufreq: add new routine cpufreq_verify_within_cpu_limits() cpufreq: Add new helper cpufreq_table_validate_and_show() cpufreq: pxa: call cpufreq_frequency_table_get_attr() cpufreq: s3cx4xx: call cpufreq_frequency_table_get_attr() cpufreq: sparc: call cpufreq_frequency_table_get_attr() cpufreq: acpi-cpufreq: use cpufreq_table_validate_and_show() cpufreq: arm_big_little: use cpufreq_table_validate_and_show() cpufreq: blackfin: use cpufreq_table_validate_and_show() cpufreq: cpufreq-cpu0: use cpufreq_table_validate_and_show() cpufreq: cris: use cpufreq_table_validate_and_show() cpufreq: davinci: use cpufreq_table_validate_and_show() cpufreq: dbx500: use cpufreq_table_validate_and_show() cpufreq: e_powersaver: use cpufreq_table_validate_and_show() cpufreq: elanfreq: use cpufreq_table_validate_and_show() cpufreq: exynos: use cpufreq_table_validate_and_show() cpufreq: ia64-acpi: use cpufreq_table_validate_and_show() cpufreq: imx6q: use cpufreq_table_validate_and_show() cpufreq: kirkwood: use cpufreq_table_validate_and_show() cpufreq: longhaul: use cpufreq_table_validate_and_show() cpufreq: loongson2: use cpufreq_table_validate_and_show() cpufreq: maple: use cpufreq_table_validate_and_show() cpufreq: omap: use cpufreq_table_validate_and_show() cpufreq: p4-clockmod: use cpufreq_table_validate_and_show() cpufreq: pasemi: use cpufreq_table_validate_and_show() cpufreq: pmac: use cpufreq_table_validate_and_show() cpufreq: powernow: use cpufreq_table_validate_and_show() cpufreq: ppc: use cpufreq_table_validate_and_show() cpufreq: pxa: use cpufreq_table_validate_and_show() cpufreq: s3cx4xx: use cpufreq_table_validate_and_show() cpufreq: s5pv210: use cpufreq_table_validate_and_show() cpufreq: sa11x0: Expose frequency table cpufreq: sa11x0: let cpufreq core initialize struct policy fields cpufreq: sc520: use cpufreq_table_validate_and_show() cpufreq: sh: use cpufreq_table_validate_and_show() cpufreq: sparc: use cpufreq_table_validate_and_show() cpufreq: spear: use cpufreq_table_validate_and_show() cpufreq: speedstep: use cpufreq_table_validate_and_show() cpufreq: tegra: use cpufreq_table_validate_and_show() cpufreq: tegra: fix implementation of ->exit() cpufreq: arm_big_little: call cpufreq_frequency_table_put_attr() cpufreq: blackfin: call cpufreq_frequency_table_put_attr() cpufreq: exynos: call cpufreq_frequency_table_put_attr() cpufreq: loongson2: call cpufreq_frequency_table_put_attr() cpufreq: omap: call cpufreq_frequency_table_put_attr() cpufreq: pxa: call cpufreq_frequency_table_put_attr() cpufreq: sparc: call cpufreq_frequency_table_put_attr() cpufreq: define generic .attr, .exit() and .verify() routines cpufreq: acpi: Use generic cpufreq routines cpufreq: arm_big_little: Use generic cpufreq routines cpufreq: at32ap: Use generic cpufreq routines cpufreq: blackfin: Use generic cpufreq routines cpufreq: cpu0: Use generic cpufreq routines cpufreq: cris: Use generic cpufreq routines cpufreq: davinci: Use generic cpufreq routines cpufreq: dbx500: Use generic cpufreq routines cpufreq: e_powersaver: Use generic cpufreq routines cpufreq: elanfreq: Use generic cpufreq routines cpufreq: exynos: Use generic cpufreq routines cpufreq: ia64-acpi: Use generic cpufreq routines cpufreq: imx6q: Use generic cpufreq routines cpufreq: kirkwood: Use generic cpufreq routines cpufreq: longhaul: Use generic cpufreq routines cpufreq: loongson2: Use generic cpufreq routines cpufreq: maple: Use generic cpufreq routines cpufreq: omap: Use generic cpufreq routines cpufreq: p4-clockmod: Use generic cpufreq routines cpufreq: pasemi: Use generic cpufreq routines cpufreq: pmac: Use generic cpufreq routines cpufreq: powernow: Use generic cpufreq routines cpufreq: ppc-corenet: Use generic cpufreq routines cpufreq: ppc_cbe: Use generic cpufreq routines cpufreq: pxa: Use generic cpufreq routines cpufreq: s3cx4xx: Use generic cpufreq routines cpufreq: s5pv210: Use generic cpufreq routines cpufreq: sa11x0: Use generic cpufreq routines cpufreq: sc520: Use generic cpufreq routines cpufreq: sh: Use generic cpufreq routines cpufreq: sparc: Use generic cpufreq routines cpufreq: spear: Use generic cpufreq routines cpufreq: speedstep: Use generic cpufreq routines cpufreq: tegra: Use generic cpufreq routines cpufreq: call cpufreq_driver->get() after calling ->init() cpufreq: acpi: don't initialize part of policy that is set by core too cpufreq: arm_big_little: don't initialize part of policy that is set by core too cpufreq: at32ap: don't initialize part of policy that is set by core too cpufreq: blackfin: don't initialize part of policy that is set by core too cpufreq: cpu0: don't initialize part of policy that is set by core too cpufreq: nforce2: don't initialize part of policy that is set by core too cpufreq: cris: don't initialize part of policy that is set by core too cpufreq: davinci: don't initialize part of policy that is set by core too cpufreq: dbx500: don't initialize part of policy that is set by core too cpufreq: e_powersaver: don't initialize part of policy that is set by core too cpufreq: elanfreq: don't initialize part of policy that is set by core too cpufreq: exynos: don't initialize part of policy that is set by core too cpufreq: gx: don't initialize part of policy that is set by core too cpufreq: ia64-acpi: don't initialize part of policy that is set by core too cpufreq: imx6q: don't initialize part of policy that is set by core too cpufreq: integrator: don't initialize part of policy that is set by core too cpufreq: kirkwood: don't initialize part of policy that is set by core too cpufreq: longhaul: don't initialize part of policy that is set by core too cpufreq: loongson2: don't initialize part of policy that is set by core too cpufreq: maple: don't initialize part of policy that is set by core too cpufreq: omap: don't initialize part of policy that is set by core too cpufreq: p4: don't initialize part of policy that is set by core too cpufreq: pcc: don't initialize part of policy that is set by core too cpufreq: pmac: don't initialize part of policy that is set by core too cpufreq: powernow: don't initialize part of policy that is set by core too cpufreq: ppc: don't initialize part of policy that is set by core too cpufreq: pxa: don't initialize part of policy that is set by core too cpufreq: s3c: don't initialize part of policy that is set by core too cpufreq: s5pv210: don't initialize part of policy that is set by core too cpufreq: sa11x0: don't initialize part of policy that is set by core too cpufreq: sc520_freq: don't initialize part of policy that is set by core too cpufreq: sh: don't initialize part of policy that is set by core too cpufreq: spear: don't initialize part of policy that is set by core too cpufreq: speedstep: don't initialize part of policy that is set by core too cpufreq: tegra: don't initialize part of policy that is set by core too cpufreq: unicore2: don't initialize part of policy that is set by core too cpufreq: create cpufreq_generic_init() routine cpufreq: remove CONFIG_CPU_FREQ_TABLE cpufreq: cpu0: use cpufreq_generic_init() routine cpufreq: cris: use cpufreq_generic_init() routine cpufreq: davinci: use cpufreq_generic_init() routine cpufreq: dbx500: use cpufreq_generic_init() routine cpufreq: exynos: use cpufreq_generic_init() routine cpufreq: imx6q: use cpufreq_generic_init() routine cpufreq: kirkwood: use cpufreq_generic_init() routine cpufreq: loongson2: use cpufreq_generic_init() routine cpufreq: maple: use cpufreq_generic_init() routine cpufreq: omap: use cpufreq_generic_init() routine cpufreq: pasemi: use cpufreq_generic_init() routine cpufreq: pmac32: use cpufreq_generic_init() routine cpufreq: pmac64: use cpufreq_generic_init() routine cpufreq: s3c: use cpufreq_generic_init() routine cpufreq: s5pv210: use cpufreq_generic_init() routine cpufreq: sa11x0: use cpufreq_generic_init() routine cpufreq: spear: use cpufreq_generic_init() routine cpufreq: tegra: use cpufreq_generic_init() routine cpufreq: Implement light weight ->target_index() routine cpufreq: acpi: Convert to light weight ->target_index() routine cpufreq: arm_big_little: Convert to light weight ->target_index() routine cpufreq: at32ap: Convert to light weight ->target_index() routine cpufreq: blackfin: Convert to light weight ->target_index() routine cpufreq: cpu0: Convert to light weight ->target_index() routine cpufreq: cris: Convert to light weight ->target_index() routine cpufreq: davinci: Convert to light weight ->target_index() routine cpufreq: dbx500: Convert to light weight ->target_index() routine cpufreq: e_powersaver: Convert to light weight ->target_index() routine cpufreq: elanfreq: Convert to light weight ->target_index() routine cpufreq: exynos: Convert to light weight ->target_index() routine cpufreq: ia64: Convert to light weight ->target_index() routine cpufreq: imx6q: Convert to light weight ->target_index() routine cpufreq: kirkwood: Convert to light weight ->target_index() routine cpufreq: longhaul: Convert to light weight ->target_index() routine cpufreq: loongson2: Convert to light weight ->target_index() routine cpufreq: maple: Convert to light weight ->target_index() routine cpufreq: omap: Convert to light weight ->target_index() routine cpufreq: p4: Convert to light weight ->target_index() routine cpufreq: pasemi: Convert to light weight ->target_index() routine cpufreq: pmac32: Convert to light weight ->target_index() routine cpufreq: powernow: Convert to light weight ->target_index() routine cpufreq: ppc: Convert to light weight ->target_index() routine cpufreq: pxa: Convert to light weight ->target_index() routine cpufreq: s3c2416: Convert to light weight ->target_index() routine cpufreq: s3c64xx: Convert to light weight ->target_index() routine cpufreq: s5pv210: Convert to light weight ->target_index() routine cpufreq: sa11x0: Convert to light weight ->target_index() routine cpufreq: sc520: Convert to light weight ->target_index() routine cpufreq: sparc: Convert to light weight ->target_index() routine cpufreq: SPEAr: Convert to light weight ->target_index() routine cpufreq: speedstep: Convert to light weight ->target_index() routine cpufreq: tegra: Convert to light weight ->target_index() routine cpufreq: move freq change notifications to cpufreq core cpufreq: acpi: remove calls to cpufreq_notify_transition() cpufreq: arm_big_little: remove calls to cpufreq_notify_transition() cpufreq: at32ap: remove calls to cpufreq_notify_transition() cpufreq: blackfin: remove calls to cpufreq_notify_transition() cpufreq: cpu0: remove calls to cpufreq_notify_transition() cpufreq: cris: remove calls to cpufreq_notify_transition() cpufreq: davinci: remove calls to cpufreq_notify_transition() cpufreq: dbx500: remove calls to cpufreq_notify_transition() cpufreq: e_powersaver: remove calls to cpufreq_notify_transition() cpufreq: elanfreq: remove calls to cpufreq_notify_transition() cpufreq: exynos: remove calls to cpufreq_notify_transition() cpufreq: ia64-acpi: remove calls to cpufreq_notify_transition() cpufreq: imx6q: remove calls to cpufreq_notify_transition() cpufreq: kirkwood: remove calls to cpufreq_notify_transition() cpufreq: loongson2: remove calls to cpufreq_notify_transition() cpufreq: maple: remove calls to cpufreq_notify_transition() cpufreq: omap: remove calls to cpufreq_notify_transition() cpufreq: p4-clockmod: remove calls to cpufreq_notify_transition() cpufreq: pasemi: remove calls to cpufreq_notify_transition() cpufreq: pmac: remove calls to cpufreq_notify_transition() cpufreq: ppc: remove calls to cpufreq_notify_transition() cpufreq: pxa: remove calls to cpufreq_notify_transition() cpufreq: s3c: remove calls to cpufreq_notify_transition() cpufreq: s5pv210: remove calls to cpufreq_notify_transition() cpufreq: sa11x0: remove calls to cpufreq_notify_transition() cpufreq: sc520: remove calls to cpufreq_notify_transition() cpufreq: sparc: remove calls to cpufreq_notify_transition() cpufreq: SPEAr: remove calls to cpufreq_notify_transition() cpufreq: speedstep: remove calls to cpufreq_notify_transition() cpufreq: tegra: remove calls to cpufreq_notify_transition() cpufreq: tegra: remove target_cpu_speed[] array cpufreq: create cpufreq_generic_get() routine cpufreq: arm_big_little: use cpufreq_generic_get() routine cpufreq: at32ap: use cpufreq_generic_get() routine cpufreq: cpu0: use cpufreq_generic_get() routine cpufreq: davinci: use cpufreq_generic_get() routine cpufreq: dbx500: use cpufreq_generic_get() routine cpufreq: exynos: use cpufreq_generic_get() routine cpufreq: imx6q: use cpufreq_generic_get() routine cpufreq: loongson2: use cpufreq_generic_get() routine cpufreq: omap: use cpufreq_generic_get() routine cpufreq: ppc: use cpufreq_generic_get() routine cpufreq: s3c: use cpufreq_generic_get() routine cpufreq: s5pv210: use cpufreq_generic_get() routine cpufreq: spear: use cpufreq_generic_get() routine cpufreq: tegra: use cpufreq_generic_get() routine cpufreq: unicore2: use cpufreq_generic_get() routine Documentation/cpu-freq/cpu-drivers.txt | 27 ++-- Documentation/cpu-freq/governors.txt | 4 +- arch/arm/mach-davinci/Kconfig | 1 - arch/arm/mach-pxa/Kconfig | 3 - arch/arm/mach-sa1100/generic.c | 81 +++--------- arch/arm/mach-sa1100/generic.h | 4 +- arch/arm/mach-ux500/Kconfig | 1 - arch/blackfin/Kconfig | 1 - arch/cris/Kconfig | 2 - drivers/cpufreq/Kconfig | 11 -- drivers/cpufreq/Kconfig.arm | 11 -- drivers/cpufreq/Kconfig.powerpc | 6 - drivers/cpufreq/Kconfig.x86 | 13 -- drivers/cpufreq/Makefile | 5 +- drivers/cpufreq/acpi-cpufreq.c | 45 ++----- drivers/cpufreq/arm_big_little.c | 75 ++---------- drivers/cpufreq/at32ap-cpufreq.c | 119 +++++++++--------- drivers/cpufreq/blackfin-cpufreq.c | 54 ++------ drivers/cpufreq/cpufreq-cpu0.c | 103 +++------------- drivers/cpufreq/cpufreq-nforce2.c | 5 +- drivers/cpufreq/cpufreq.c | 217 +++++++++++++++++++++++++-------- drivers/cpufreq/cpufreq_governor.h | 5 +- drivers/cpufreq/cris-artpec3-cpufreq.c | 64 +--------- drivers/cpufreq/cris-etraxfs-cpufreq.c | 61 +-------- drivers/cpufreq/davinci-cpufreq.c | 87 +++---------- drivers/cpufreq/dbx500-cpufreq.c | 97 ++------------- drivers/cpufreq/e_powersaver.c | 59 ++------- drivers/cpufreq/elanfreq.c | 88 ++----------- drivers/cpufreq/exynos-cpufreq.c | 93 +++----------- drivers/cpufreq/exynos5440-cpufreq.c | 84 ++++--------- drivers/cpufreq/freq_table.c | 59 ++++++--- drivers/cpufreq/gx-suspmod.c | 5 +- drivers/cpufreq/ia64-acpi-cpufreq.c | 71 +---------- drivers/cpufreq/imx6q-cpufreq.c | 99 ++++----------- drivers/cpufreq/integrator-cpufreq.c | 14 +-- drivers/cpufreq/intel_pstate.c | 4 +- drivers/cpufreq/kirkwood-cpufreq.c | 107 ++++------------ drivers/cpufreq/longhaul.c | 45 +------ drivers/cpufreq/longrun.c | 4 +- drivers/cpufreq/loongson2_cpufreq.c | 72 ++--------- drivers/cpufreq/maple-cpufreq.c | 56 +-------- drivers/cpufreq/omap-cpufreq.c | 158 ++++++------------------ drivers/cpufreq/p4-clockmod.c | 53 ++------ drivers/cpufreq/pasemi-cpufreq.c | 51 +------- drivers/cpufreq/pcc-cpufreq.c | 10 +- drivers/cpufreq/pmac32-cpufreq.c | 53 ++------ drivers/cpufreq/pmac64-cpufreq.c | 57 +-------- drivers/cpufreq/powernow-k6.c | 67 ++-------- drivers/cpufreq/powernow-k7.c | 42 ++----- drivers/cpufreq/powernow-k8.c | 53 ++------ drivers/cpufreq/ppc-corenet-cpufreq.c | 69 ++--------- drivers/cpufreq/ppc_cbe_cpufreq.c | 50 +------- drivers/cpufreq/pxa2xx-cpufreq.c | 70 +++-------- drivers/cpufreq/pxa3xx-cpufreq.c | 46 ++----- drivers/cpufreq/s3c2416-cpufreq.c | 67 ++-------- drivers/cpufreq/s3c24xx-cpufreq.c | 37 +----- drivers/cpufreq/s3c64xx-cpufreq.c | 108 +++++----------- drivers/cpufreq/s5pv210-cpufreq.c | 105 ++++------------ drivers/cpufreq/sa1100-cpufreq.c | 49 ++------ drivers/cpufreq/sa1110-cpufreq.c | 46 ++----- drivers/cpufreq/sc520_freq.c | 64 +--------- drivers/cpufreq/sh-cpufreq.c | 22 +--- drivers/cpufreq/sparc-us2e-cpufreq.c | 42 ++----- drivers/cpufreq/sparc-us3-cpufreq.c | 44 ++----- drivers/cpufreq/spear-cpufreq.c | 72 ++--------- drivers/cpufreq/speedstep-centrino.c | 81 ++---------- drivers/cpufreq/speedstep-ich.c | 85 ++----------- drivers/cpufreq/speedstep-smi.c | 76 ++---------- drivers/cpufreq/tegra-cpufreq.c | 114 ++++------------- drivers/cpufreq/unicore2-cpufreq.c | 26 ++-- drivers/thermal/Kconfig | 1 - include/linux/cpufreq.h | 59 ++++++--- 72 files changed, 922 insertions(+), 2917 deletions(-) -- 1.7.12.rc2.18.g61b472e

12 years

Re: [RFC PATCH] ARM: Flush L2 cache on soft_restart

by Taras Kondratiuk

On 2 October 2013 20:31, Will Deacon <will.deacon(a)arm.com> wrote: > On Wed, Oct 02, 2013 at 06:19:30PM +0100, Taras Kondratiuk wrote: >> On 2 October 2013 15:49, Will Deacon <will.deacon(a)arm.com> wrote: >> > On Wed, Oct 02, 2013 at 12:34:16PM +0100, Taras Kondratiuk wrote: >> >> diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c >> >> index 94f6b05..e359b62 100644 >> >> --- a/arch/arm/kernel/process.c >> >> +++ b/arch/arm/kernel/process.c >> >> @@ -103,9 +103,11 @@ void soft_restart(unsigned long addr) >> >> local_irq_disable(); >> >> local_fiq_disable(); >> >> >> >> - /* Disable the L2 if we're the last man standing. */ >> >> - if (num_online_cpus() == 1) >> >> + /* Flush and disable the L2 if we're the last man standing. */ >> >> + if (num_online_cpus() == 1) { >> >> + outer_flush_all(); >> >> outer_disable(); >> > >> > l2x0_disable already contains a flush, so this doesn't change anything. >> >> Unfortunately not everybody uses l2x0_disable(). >> SoC's that use SMC calls for L2 cache maintenance have its own implementation >> of outer_cache.disable which usually doesn't flush cache implicitly. > > In which case, we should probably fix the disabling code to make a flush > then update callers not to bother with redundant flushing. The flushing > during the disable code is likely required anyway if there's any > synchronisation going on. It makes sense, but a history of the current code looks a bit confusing. Implicit flush was added in l2x0_disable() as a "side effect" of commit 38a8914f9ac2379293944f613e6ca24b61373de8 "ARM: 6987/1: l2x0: fix disabling function to avoid deadlock", while initially disable was just a disable. Maybe it worth to explicitly document that .disable callback must flush cache? -- Regards, Taras Kondratiuk

12 years

linus/master boot: 29 pass, 0 fail (v3.12-rc3-267-g6d15ee4)

by Kevin Hilman build bot

12 years

[PATCH] linaro/configs: add hugepage config fragment

by Zi Shen Lim

Signed-off-by: Zi Shen Lim <zishen.lim(a)linaro.org> --- linaro/configs/hugepage.conf | 4 ++++ 1 file changed, 4 insertions(+) create mode 100644 linaro/configs/hugepage.conf diff --git a/linaro/configs/hugepage.conf b/linaro/configs/hugepage.conf new file mode 100644 index 0000000..731ab7d --- /dev/null +++ b/linaro/configs/hugepage.conf @@ -0,0 +1,4 @@ +CONFIG_HUGETLB_PAGE=y +CONFIG_HUGETLBFS=y +CONFIG_TRANSPARENT_HUGEPAGE=y +CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y -- 1.8.1.2

12 years

[PATCH v2 0/3] arm, arm64: check for number of arguments in syscall_get/set_arguments()

by AKASHI Takahiro

# added Roland <mcgrathr@chromium> in CC for asm-generic/syscall.h I modified my patch based on Will's comments. Speaking of arm, i + n is checked against SYSCALL_MAX_ARGS (== 7), but it seems that the kernel code assumes that the current max number of arguments would be 6. For example, SYSCALL_DEFINEn are defined from 0 to 6. Am i wrong? Changes: * added a patch to arm as well * added a patch to asm-generic/syscall.h; corrected the description on syscall_get_arguments() and syscall_put_arguments() * removed portion of commit message which referred to asm-generic/syscall.h in arm64 AKASHI Takahiro (3): arm64: check for number of arguments in syscall_get/set_arguments() arm: check for number of arguments in syscall_get/set_arguments() asm-generic: syscall_get/set_arguments accept zero for number of arguments arch/arm/include/asm/syscall.h | 6 ++++++ arch/arm64/include/asm/syscall.h | 6 ++++++ include/asm-generic/syscall.h | 4 ++-- 3 files changed, 14 insertions(+), 2 deletions(-) -- 1.7.9.5

12 years

[PATCH 00/21] CPUIdle: Minor cleanups for 3.13

by Viresh Kumar

Hi Rafael/Daniel, This is a small cleanup patchset for CPUIdle which can go in 3.13 if it looks okay to you guys.. Mostly trivial patches but few are doing good/significant changes. Tested on my thinkpad with suspend/resume and didn't found any broken stuff with it. I a not very sure about this patch (As I don't know about all aspects of CPUIdle framework): cpuidle: don't call poll_idle_init() for every cpu -- viresh Viresh Kumar (21): cpuidle: fix indentation of cpumask cpuidle: Fix comments in cpuidle core cpuidle: make __cpuidle_get_cpu_driver() inline cpuidle: make __cpuidle_device_init() return void cpuidle: make __cpuidle_driver_init() return void cpuidle: rearrange code in __cpuidle_driver_init() cpuidle: rearrange __cpuidle_register_device() to keep minimal exit points cpuidle: use cpuidle_disabled() instead of "off" cpuidle: merge two if() statements for checking error cases cpuidle: reduce code duplication inside cpuidle_idle_call() cpuidle: replace multiline statements with single line in cpuidle_idle_call() cpuidle: call cpuidle_get_driver() from after taking cpuidle_driver_lock cpuidle: use drv instead of cpuidle_driver in show_current_driver() cpuidle: coupled: don't compare cpu masks unnecessarily cpuidle: free all state kobjects from cpuidle_free_state_kobj() cpuidle: avoid unnecessary kzalloc/free of struct cpuidle_device_kobj cpuidle: avoid unnecessary kzalloc/free of struct cpuidle_driver_kobj cpuidle: don't call poll_idle_init() for every cpu cpuidle: create list of registered drivers cpuidle: don't calculate time-diff if entered_state == 0 cpuidle: change governor from within cpuidle_replace_governor() drivers/cpuidle/coupled.c | 9 +-- drivers/cpuidle/cpuidle.c | 95 +++++++------------------ drivers/cpuidle/driver.c | 171 ++++++++++++++++++++------------------------- drivers/cpuidle/governor.c | 24 +++---- drivers/cpuidle/sysfs.c | 74 +++++++------------- include/linux/cpuidle.h | 25 +++++-- 6 files changed, 161 insertions(+), 237 deletions(-) -- 1.7.12.rc2.18.g61b472e

12 years

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linaro-kernel October 2013