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[obsolete] slub-track-number-of-slabs-irrespective-of-config_slub_debug.patch removed from -mm tree

by akpm＠linux-foundation.org

The patch titled Subject: slub: track number of slabs irrespective of CONFIG_SLUB_DEBUG has been removed from the -mm tree. Its filename was slub-track-number-of-slabs-irrespective-of-config_slub_debug.patch This patch was dropped because it is obsolete ------------------------------------------------------ From: Shakeel Butt <shakeelb(a)google.com> Subject: slub: track number of slabs irrespective of CONFIG_SLUB_DEBUG For !CONFIG_SLUB_DEBUG, SLUB does not maintain the number of slabs allocated per node for a kmem_cache. Thus, slabs_node() in __kmem_cache_empty(), __kmem_cache_shrink() and __kmem_cache_destroy() will always return 0 for such config. This is wrong and can cause issues for all users of these functions. In fact in [1] Jason has reported a system crash while using SLUB without CONFIG_SLUB_DEBUG. The reason was the usage of slabs_node() by __kmem_cache_empty(). The right solution is to make slabs_node() work even for !CONFIG_SLUB_DEBUG. The commit 0f389ec63077 ("slub: No need for per node slab counters if !SLUB_DEBUG") had put the per node slab counter under CONFIG_SLUB_DEBUG because it was only read through sysfs API and the sysfs API was disabled on !CONFIG_SLUB_DEBUG. However the users of the per node slab counter assumed that it will work in the absence of CONFIG_SLUB_DEBUG. So, make the counter work for !CONFIG_SLUB_DEBUG. Please note that f9e13c0a5a33 ("slab, slub: skip unnecessary kasan_cache_shutdown()") exposed this issue but it is present even before. [1] http://lkml.kernel.org/r/CAHmME9rtoPwxUSnktxzKso14iuVCWT7BE_-_8PAC=pGw1iJnQ… Link: http://lkml.kernel.org/r/20180620224147.23777-1-shakeelb@google.com Fixes: f9e13c0a5a33 ("slab, slub: skip unnecessary kasan_cache_shutdown()") Signed-off-by: Shakeel Butt <shakeelb(a)google.com> Suggested-by: David Rientjes <rientjes(a)google.com> Reported-by: Jason A . Donenfeld <Jason(a)zx2c4.com> Cc: Christoph Lameter <cl(a)linux.com> Cc: Pekka Enberg <penberg(a)kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim(a)lge.com> Cc: Andrey Ryabinin <aryabinin(a)virtuozzo.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/slab.h | 2 - mm/slub.c | 80 ++++++++++++++++++++++++---------------------------- 2 files changed, 38 insertions(+), 44 deletions(-) diff -puN mm/slab.h~slub-track-number-of-slabs-irrespective-of-config_slub_debug mm/slab.h --- a/mm/slab.h~slub-track-number-of-slabs-irrespective-of-config_slub_debug +++ a/mm/slab.h @@ -473,8 +473,8 @@ struct kmem_cache_node { #ifdef CONFIG_SLUB unsigned long nr_partial; struct list_head partial; -#ifdef CONFIG_SLUB_DEBUG atomic_long_t nr_slabs; +#ifdef CONFIG_SLUB_DEBUG atomic_long_t total_objects; struct list_head full; #endif diff -puN mm/slub.c~slub-track-number-of-slabs-irrespective-of-config_slub_debug mm/slub.c --- a/mm/slub.c~slub-track-number-of-slabs-irrespective-of-config_slub_debug +++ a/mm/slub.c @@ -1030,42 +1030,6 @@ static void remove_full(struct kmem_cach list_del(&page->lru); } -/* Tracking of the number of slabs for debugging purposes */ -static inline unsigned long slabs_node(struct kmem_cache *s, int node) -{ - struct kmem_cache_node *n = get_node(s, node); - - return atomic_long_read(&n->nr_slabs); -} - -static inline unsigned long node_nr_slabs(struct kmem_cache_node *n) -{ - return atomic_long_read(&n->nr_slabs); -} - -static inline void inc_slabs_node(struct kmem_cache *s, int node, int objects) -{ - struct kmem_cache_node *n = get_node(s, node); - - /* - * May be called early in order to allocate a slab for the - * kmem_cache_node structure. Solve the chicken-egg - * dilemma by deferring the increment of the count during - * bootstrap (see early_kmem_cache_node_alloc). - */ - if (likely(n)) { - atomic_long_inc(&n->nr_slabs); - atomic_long_add(objects, &n->total_objects); - } -} -static inline void dec_slabs_node(struct kmem_cache *s, int node, int objects) -{ - struct kmem_cache_node *n = get_node(s, node); - - atomic_long_dec(&n->nr_slabs); - atomic_long_sub(objects, &n->total_objects); -} - /* Object debug checks for alloc/free paths */ static void setup_object_debug(struct kmem_cache *s, struct page *page, void *object) @@ -1321,16 +1285,46 @@ slab_flags_t kmem_cache_flags(unsigned i #define disable_higher_order_debug 0 +#endif /* CONFIG_SLUB_DEBUG */ + static inline unsigned long slabs_node(struct kmem_cache *s, int node) - { return 0; } +{ + struct kmem_cache_node *n = get_node(s, node); + + return atomic_long_read(&n->nr_slabs); +} + static inline unsigned long node_nr_slabs(struct kmem_cache_node *n) - { return 0; } -static inline void inc_slabs_node(struct kmem_cache *s, int node, - int objects) {} -static inline void dec_slabs_node(struct kmem_cache *s, int node, - int objects) {} +{ + return atomic_long_read(&n->nr_slabs); +} -#endif /* CONFIG_SLUB_DEBUG */ +static inline void inc_slabs_node(struct kmem_cache *s, int node, int objects) +{ + struct kmem_cache_node *n = get_node(s, node); + + /* + * May be called early in order to allocate a slab for the + * kmem_cache_node structure. Solve the chicken-egg + * dilemma by deferring the increment of the count during + * bootstrap (see early_kmem_cache_node_alloc). + */ + if (likely(n)) { + atomic_long_inc(&n->nr_slabs); +#ifdef CONFIG_SLUB_DEBUG + atomic_long_add(objects, &n->total_objects); +#endif + } +} +static inline void dec_slabs_node(struct kmem_cache *s, int node, int objects) +{ + struct kmem_cache_node *n = get_node(s, node); + + atomic_long_dec(&n->nr_slabs); +#ifdef CONFIG_SLUB_DEBUG + atomic_long_sub(objects, &n->total_objects); +#endif +} /* * Hooks for other subsystems that check memory allocations. In a typical _ Patches currently in -mm which might be from shakeelb(a)google.com are kvm-mm-account-shadow-page-tables-to-kmemcg.patch fs-fsnotify-account-fsnotify-metadata-to-kmemcg.patch fs-fsnotify-account-fsnotify-metadata-to-kmemcg-fix.patch fs-mm-account-buffer_head-to-kmemcg.patch fs-mm-account-buffer_head-to-kmemcgpatchfix.patch memcg-reduce-memcg-tree-traversals-for-stats-collection.patch

7 years, 4 months

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Re: [PATCH 1/7] tracing: Fix double free of event_trigger_data

by Steven Rostedt

On Thu, 26 Jul 2018 19:06:08 -0400 Steven Rostedt <rostedt(a)goodmis.org> wrote: > From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org> > > > Cc: stable(a)vger.kerne.org Ug, I had a typo here. :-/ -- Steve

7 years, 4 months

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[PATCH 7/7] kthread, tracing: Dont expose half-written comm when creating kthreads

by Steven Rostedt

From: Snild Dolkow <snild(a)sony.com> There is a window for racing when printing directly to task->comm, allowing other threads to see a non-terminated string. The vsnprintf function fills the buffer, counts the truncated chars, then finally writes the \0 at the end. creator other vsnprintf: fill (not terminated) count the rest trace_sched_waking(p): ... memcpy(comm, p->comm, TASK_COMM_LEN) write \0 The consequences depend on how 'other' uses the string. In our case, it was copied into the tracing system's saved cmdlines, a buffer of adjacent TASK_COMM_LEN-byte buffers (note the 'n' where 0 should be): crash-arm64> x/1024s savedcmd->saved_cmdlines | grep 'evenk' 0xffffffd5b3818640: "irq/497-pwr_evenkworker/u16:12" ...and a strcpy out of there would cause stack corruption: [224761.522292] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffff9bf9783c78 crash-arm64> kbt | grep 'comm\|trace_print_context' #6 0xffffff9bf9783c78 in trace_print_context+0x18c(+396) comm (char [16]) = "irq/497-pwr_even" crash-arm64> rd 0xffffffd4d0e17d14 8 ffffffd4d0e17d14: 2f71726900000000 5f7277702d373934 ....irq/497-pwr_ ffffffd4d0e17d24: 726f776b6e657665 3a3631752f72656b evenkworker/u16: ffffffd4d0e17d34: f9780248ff003231 cede60e0ffffff9b 12..H.x......`.. ffffffd4d0e17d44: cede60c8ffffffd4 00000fffffffffd4 .....`.......... The workaround in e09e28671 (use strlcpy in __trace_find_cmdline) was likely needed because of this same bug. Solved by vsnprintf:ing to a local buffer, then using set_task_comm(). This way, there won't be a window where comm is not terminated. Link: http://lkml.kernel.org/r/20180726071539.188015-1-snild@sony.com Cc: stable(a)vger.kernel.org Fixes: bc0c38d139ec7 ("ftrace: latency tracer infrastructure") Reviewed-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Snild Dolkow <snild(a)sony.com> Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- kernel/kthread.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/kernel/kthread.c b/kernel/kthread.c index 750cb8082694..486dedbd9af5 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -325,8 +325,14 @@ struct task_struct *__kthread_create_on_node(int (*threadfn)(void *data), task = create->result; if (!IS_ERR(task)) { static const struct sched_param param = { .sched_priority = 0 }; + char name[TASK_COMM_LEN]; - vsnprintf(task->comm, sizeof(task->comm), namefmt, args); + /* + * task is already visible to other tasks, so updating + * COMM must be protected. + */ + vsnprintf(name, sizeof(name), namefmt, args); + set_task_comm(task, name); /* * root may have changed our (kthreadd's) priority or CPU mask. * The kernel thread should not inherit these properties. -- 2.17.1

7 years, 4 months

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[PATCH 6/7] tracing: Quiet gcc warning about maybe unused link variable

by Steven Rostedt

From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org> Commit 57ea2a34adf4 ("tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure") added an if statement that depends on another if statement that gcc doesn't see will initialize the "link" variable and gives the warning: "warning: 'link' may be used uninitialized in this function" It is really a false positive, but to quiet the warning, and also to make sure that it never actually is used uninitialized, initialize the "link" variable to NULL and add an if (!WARN_ON_ONCE(!link)) where the compiler thinks it could be used uninitialized. Cc: stable(a)vger.kernel.org Fixes: 57ea2a34adf4 ("tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure") Reported-by: kbuild test robot <lkp(a)intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- kernel/trace/trace_kprobe.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 27ace4513c43..6b71860f3998 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -400,7 +400,7 @@ static struct trace_kprobe *find_trace_kprobe(const char *event, static int enable_trace_kprobe(struct trace_kprobe *tk, struct trace_event_file *file) { - struct event_file_link *link; + struct event_file_link *link = NULL; int ret = 0; if (file) { @@ -426,7 +426,9 @@ enable_trace_kprobe(struct trace_kprobe *tk, struct trace_event_file *file) if (ret) { if (file) { - list_del_rcu(&link->list); + /* Notice the if is true on not WARN() */ + if (!WARN_ON_ONCE(!link)) + list_del_rcu(&link->list); kfree(link); tk->tp.flags &= ~TP_FLAG_TRACE; } else { -- 2.17.1

7 years, 4 months

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[PATCH 5/7] tracing: Fix possible double free in event_enable_trigger_func()

by Steven Rostedt

From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org> There was a case that triggered a double free in event_trigger_callback() due to the called reg() function freeing the trigger_data and then it getting freed again by the error return by the caller. The solution there was to up the trigger_data ref count. Code inspection found that event_enable_trigger_func() has the same issue, but is not as easy to trigger (requires harder to trigger failures). It needs to be solved slightly different as it needs more to clean up when the reg() function fails. Link: http://lkml.kernel.org/r/20180725124008.7008e586@gandalf.local.home Cc: stable(a)vger.kernel.org Fixes: 7862ad1846e99 ("tracing: Add 'enable_event' and 'disable_event' event trigger commands") Reivewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- kernel/trace/trace_events_trigger.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index d18ec0e58be2..5dea177cef53 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -1420,6 +1420,9 @@ int event_enable_trigger_func(struct event_command *cmd_ops, goto out; } + /* Up the trigger_data count to make sure nothing frees it on failure */ + event_trigger_init(trigger_ops, trigger_data); + if (trigger) { number = strsep(&trigger, ":"); @@ -1470,6 +1473,7 @@ int event_enable_trigger_func(struct event_command *cmd_ops, goto out_disable; /* Just return zero, not the number of enabled functions */ ret = 0; + event_trigger_free(trigger_ops, trigger_data); out: return ret; @@ -1480,7 +1484,7 @@ int event_enable_trigger_func(struct event_command *cmd_ops, out_free: if (cmd_ops->set_filter) cmd_ops->set_filter(NULL, trigger_data, NULL); - kfree(trigger_data); + event_trigger_free(trigger_ops, trigger_data); kfree(enable_data); goto out; } -- 2.17.1

7 years, 4 months

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[PATCH 4/7] tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure

by Steven Rostedt

From: Artem Savkov <asavkov(a)redhat.com> If enable_trace_kprobe fails to enable the probe in enable_k(ret)probe it returns an error, but does not unset the tp flags it set previously. This results in a probe being considered enabled and failures like being unable to remove the probe through kprobe_events file since probes_open() expects every probe to be disabled. Link: http://lkml.kernel.org/r/20180725102826.8300-1-asavkov@redhat.com Link: http://lkml.kernel.org/r/20180725142038.4765-1-asavkov@redhat.com Cc: Ingo Molnar <mingo(a)redhat.com> Cc: stable(a)vger.kernel.org Fixes: 41a7dd420c57 ("tracing/kprobes: Support ftrace_event_file base multibuffer") Acked-by: Masami Hiramatsu <mhiramat(a)kernel.org> Reviewed-by: Josh Poimboeuf <jpoimboe(a)redhat.com> Signed-off-by: Artem Savkov <asavkov(a)redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- kernel/trace/trace_kprobe.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 21f718472942..27ace4513c43 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -400,11 +400,10 @@ static struct trace_kprobe *find_trace_kprobe(const char *event, static int enable_trace_kprobe(struct trace_kprobe *tk, struct trace_event_file *file) { + struct event_file_link *link; int ret = 0; if (file) { - struct event_file_link *link; - link = kmalloc(sizeof(*link), GFP_KERNEL); if (!link) { ret = -ENOMEM; @@ -424,6 +423,16 @@ enable_trace_kprobe(struct trace_kprobe *tk, struct trace_event_file *file) else ret = enable_kprobe(&tk->rp.kp); } + + if (ret) { + if (file) { + list_del_rcu(&link->list); + kfree(link); + tk->tp.flags &= ~TP_FLAG_TRACE; + } else { + tk->tp.flags &= ~TP_FLAG_PROFILE; + } + } out: return ret; } -- 2.17.1

7 years, 4 months

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[PATCH 2/7] ring_buffer: tracing: Inherit the tracing setting to next ring buffer

by Steven Rostedt

From: Masami Hiramatsu <mhiramat(a)kernel.org> Maintain the tracing on/off setting of the ring_buffer when switching to the trace buffer snapshot. Taking a snapshot is done by swapping the backup ring buffer (max_tr_buffer). But since the tracing on/off setting is defined by the ring buffer, when swapping it, the tracing on/off setting can also be changed. This causes a strange result like below: /sys/kernel/debug/tracing # cat tracing_on 1 /sys/kernel/debug/tracing # echo 0 > tracing_on /sys/kernel/debug/tracing # cat tracing_on 0 /sys/kernel/debug/tracing # echo 1 > snapshot /sys/kernel/debug/tracing # cat tracing_on 1 /sys/kernel/debug/tracing # echo 1 > snapshot /sys/kernel/debug/tracing # cat tracing_on 0 We don't touch tracing_on, but snapshot changes tracing_on setting each time. This is an anomaly, because user doesn't know that each "ring_buffer" stores its own tracing-enable state and the snapshot is done by swapping ring buffers. Link: http://lkml.kernel.org/r/153149929558.11274.11730609978254724394.stgit@devb… Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tom Zanussi <tom.zanussi(a)linux.intel.com> Cc: Hiraku Toyooka <hiraku.toyooka(a)cybertrust.co.jp> Cc: stable(a)vger.kernel.org Fixes: debdd57f5145 ("tracing: Make a snapshot feature available from userspace") Signed-off-by: Masami Hiramatsu <mhiramat(a)kernel.org> [ Updated commit log and comment in the code ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- include/linux/ring_buffer.h | 1 + kernel/trace/ring_buffer.c | 16 ++++++++++++++++ kernel/trace/trace.c | 6 ++++++ 3 files changed, 23 insertions(+) diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h index b72ebdff0b77..003d09ab308d 100644 --- a/include/linux/ring_buffer.h +++ b/include/linux/ring_buffer.h @@ -165,6 +165,7 @@ void ring_buffer_record_enable(struct ring_buffer *buffer); void ring_buffer_record_off(struct ring_buffer *buffer); void ring_buffer_record_on(struct ring_buffer *buffer); int ring_buffer_record_is_on(struct ring_buffer *buffer); +int ring_buffer_record_is_set_on(struct ring_buffer *buffer); void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu); void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu); diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 6a46af21765c..0b0b688ea166 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -3226,6 +3226,22 @@ int ring_buffer_record_is_on(struct ring_buffer *buffer) return !atomic_read(&buffer->record_disabled); } +/** + * ring_buffer_record_is_set_on - return true if the ring buffer is set writable + * @buffer: The ring buffer to see if write is set enabled + * + * Returns true if the ring buffer is set writable by ring_buffer_record_on(). + * Note that this does NOT mean it is in a writable state. + * + * It may return true when the ring buffer has been disabled by + * ring_buffer_record_disable(), as that is a temporary disabling of + * the ring buffer. + */ +int ring_buffer_record_is_set_on(struct ring_buffer *buffer) +{ + return !(atomic_read(&buffer->record_disabled) & RB_BUFFER_OFF); +} + /** * ring_buffer_record_disable_cpu - stop all writes into the cpu_buffer * @buffer: The ring buffer to stop writes to. diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 87cf25171fb8..823687997b01 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1373,6 +1373,12 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu) arch_spin_lock(&tr->max_lock); + /* Inherit the recordable setting from trace_buffer */ + if (ring_buffer_record_is_set_on(tr->trace_buffer.buffer)) + ring_buffer_record_on(tr->max_buffer.buffer); + else + ring_buffer_record_off(tr->max_buffer.buffer); + swap(tr->trace_buffer.buffer, tr->max_buffer.buffer); __update_max_tr(tr, tsk, cpu); -- 2.17.1

7 years, 4 months

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FAILED: patch "[PATCH] drm/nouveau: Set DRIVER_ATOMIC cap earlier to fix debugfs" failed to apply to 4.17-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.17-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From eb493fbc150f4a28151ae1ee84f24395989f3600 Mon Sep 17 00:00:00 2001 From: Lyude Paul <lyude(a)redhat.com> Date: Tue, 3 Jul 2018 16:31:41 -0400 Subject: [PATCH] drm/nouveau: Set DRIVER_ATOMIC cap earlier to fix debugfs Currently nouveau doesn't actually expose the state debugfs file that's usually provided for any modesetting driver that supports atomic, even if nouveau is loaded with atomic=1. This is due to the fact that the standard debugfs files that DRM creates for atomic drivers is called when drm_get_pci_dev() is called from nouveau_drm.c. This happens well before we've initialized the display core, which is currently responsible for setting the DRIVER_ATOMIC cap. So, move the atomic option into nouveau_drm.c and just add the DRIVER_ATOMIC cap whenever it's enabled on the kernel commandline. This shouldn't cause any actual issues, as the atomic ioctl will still fail as expected even if the display core doesn't disable it until later in the init sequence. This also provides the added benefit of being able to use the state debugfs file to check the current display state even if clients aren't allowed to modify it through anything other than the legacy ioctls. Additionally, disable the DRIVER_ATOMIC cap in nv04's display core, as this was already disabled there previously. Signed-off-by: Lyude Paul <lyude(a)redhat.com> Cc: stable(a)vger.kernel.org Signed-off-by: Ben Skeggs <bskeggs(a)redhat.com> diff --git a/drivers/gpu/drm/nouveau/dispnv04/disp.c b/drivers/gpu/drm/nouveau/dispnv04/disp.c index 501d2d290e9c..70dce544984e 100644 --- a/drivers/gpu/drm/nouveau/dispnv04/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv04/disp.c @@ -55,6 +55,9 @@ nv04_display_create(struct drm_device *dev) nouveau_display(dev)->init = nv04_display_init; nouveau_display(dev)->fini = nv04_display_fini; + /* Pre-nv50 doesn't support atomic, so don't expose the ioctls */ + dev->driver->driver_features &= ~DRIVER_ATOMIC; + nouveau_hw_save_vga_fonts(dev, 1); nv04_crtc_create(dev, 0); diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index 31b12b4f321a..9bae4db84cfb 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -2126,10 +2126,6 @@ nv50_display_destroy(struct drm_device *dev) kfree(disp); } -MODULE_PARM_DESC(atomic, "Expose atomic ioctl (default: disabled)"); -static int nouveau_atomic = 0; -module_param_named(atomic, nouveau_atomic, int, 0400); - int nv50_display_create(struct drm_device *dev) { @@ -2154,8 +2150,6 @@ nv50_display_create(struct drm_device *dev) disp->disp = &nouveau_display(dev)->disp; dev->mode_config.funcs = &nv50_disp_func; dev->driver->driver_features |= DRIVER_PREFER_XBGR_30BPP; - if (nouveau_atomic) - dev->driver->driver_features |= DRIVER_ATOMIC; /* small shared memory area we use for notifiers and semaphores */ ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM, diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 514903338782..f5d3158f0378 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -81,6 +81,10 @@ MODULE_PARM_DESC(modeset, "enable driver (default: auto, " int nouveau_modeset = -1; module_param_named(modeset, nouveau_modeset, int, 0400); +MODULE_PARM_DESC(atomic, "Expose atomic ioctl (default: disabled)"); +static int nouveau_atomic = 0; +module_param_named(atomic, nouveau_atomic, int, 0400); + MODULE_PARM_DESC(runpm, "disable (0), force enable (1), optimus only default (-1)"); static int nouveau_runtime_pm = -1; module_param_named(runpm, nouveau_runtime_pm, int, 0400); @@ -509,6 +513,9 @@ static int nouveau_drm_probe(struct pci_dev *pdev, pci_set_master(pdev); + if (nouveau_atomic) + driver_pci.driver_features |= DRIVER_ATOMIC; + ret = drm_get_pci_dev(pdev, pent, &driver_pci); if (ret) { nvkm_device_del(&device);

7 years, 4 months

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Re: [PATCH] clk: meson-gxbb: set fclk_div2 as CLK_IS_CRITICAL

by Neil Armstrong

Hi Stable Team, On 13/06/2018 14:20, Neil Armstrong wrote: > On Amlogic Meson GXBB & GXL platforms, the SCPI Cortex-M4 Co-Processor > seems to be dependent on the FCLK_DIV2 to be operationnal. > > The issue occured since v4.17-rc1 by freezing the kernel boot when > the 'schedutil' cpufreq governor was selected as default : > > [ 12.071837] scpi_protocol scpi: SCP Protocol 0.0 Firmware 0.0.0 version > domain-0 init dvfs: 4 > [ 12.087757] hctosys: unable to open rtc device (rtc0) > [ 12.087907] cfg80211: Loading compiled-in X.509 certificates for regulatory database > [ 12.102241] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' > > But when disabling the MMC driver, the boot finished but cpufreq failed to > change the CPU frequency : > > [ 12.153045] cpufreq: __target_index: Failed to change cpu frequency: -5 > > A bisect between v4.16 and v4.16-rc1 gave the 05f814402d61 commit to be > the first bad commit. > This commit added support for the missing clock gates before the fixed PLL > fixed dividers (FCLK_DIVx) and the clock framework basically disabled > all the unused fixed dividers, thus disabled a critical clock path for > the SCPI Co-Processor. > > This patch simply sets the FCLK_DIV2 gate as critical to ensure > nobody can disable it. > > Fixes: 05f814402d61 ("clk: meson: add fdiv clock gates") > Signed-off-by: Neil Armstrong <narmstrong(a)baylibre.com> This patch hit linux master with commit id c987ac6f1f088663b6dad39281071aeb31d450a8 Could this be backported to the next 4.17 stable release ? Thanks, Neil > --- > drivers/clk/meson/gxbb.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/clk/meson/gxbb.c b/drivers/clk/meson/gxbb.c > index b1e4d95..0e053c1 100644 > --- a/drivers/clk/meson/gxbb.c > +++ b/drivers/clk/meson/gxbb.c > @@ -511,6 +511,7 @@ static struct clk_regmap gxbb_fclk_div2 = { > .ops = &clk_regmap_gate_ops, > .parent_names = (const char *[]){ "fclk_div2_div" }, > .num_parents = 1, > + .flags = CLK_IS_CRITICAL, > }, > }; > >

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[PATCH 4.4 000/105] 4.4.139-stable review

by Greg Kroah-Hartman

This is the start of the stable review cycle for the 4.4.139 release. There are 105 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know. Responses should be made by Tue Jul 3 15:31:30 UTC 2018. Anything received after that time might be too late. The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.139-rc… or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y and the diffstat can be found below. thanks, greg k-h ------------- Pseudo-Shortlog of commits: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Linux 4.4.139-rc1 Szymon Janc <szymon.janc(a)codecoup.pl> Bluetooth: Fix connection if directed advertising and privacy is used Bjørn Mork <bjorn(a)mork.no> cdc_ncm: avoid padding beyond end of skb Mike Snitzer <snitzer(a)redhat.com> dm thin: handle running out of data space vs concurrent discard Keith Busch <keith.busch(a)intel.com> block: Fix transfer when chunk sectors exceeds max Maxime Chevallier <maxime.chevallier(a)bootlin.com> spi: Fix scatterlist elements size in spi_map_buf Liu Bo <bo.li.liu(a)oracle.com> Btrfs: fix unexpected cow in run_delalloc_nocow Takashi Iwai <tiwai(a)suse.de> ALSA: hda/realtek - Add a quirk for FSC ESPRIMO U9210 ??? <kt.liao(a)emc.com.tw> Input: elantech - fix V4 report decoding for module with middle key Aaron Ma <aaron.ma(a)canonical.com> Input: elantech - enable middle button of touchpads on ThinkPad P52 Ben Hutchings <ben.hutchings(a)codethink.co.uk> Input: elan_i2c_smbus - fix more potential stack buffer overflows Jan Kara <jack(a)suse.cz> udf: Detect incorrect directory size Boris Ostrovsky <boris.ostrovsky(a)oracle.com> xen: Remove unnecessary BUG_ON from __unbind_from_irq() Alexandr Savca <alexandr.savca(a)saltedge.com> Input: elan_i2c - add ELAN0618 (Lenovo v330 15IKB) ACPI ID Kees Cook <keescook(a)chromium.org> video: uvesafb: Fix integer overflow in allocation Dave Wysochanski <dwysocha(a)redhat.com> NFSv4: Fix possible 1-byte stack overflow in nfs_idmap_read_and_verify_message Scott Mayhew <smayhew(a)redhat.com> nfsd: restrict rd_maxcount to svc_max_payload in nfsd_encode_readdir Mauro Carvalho Chehab <mchehab(a)s-opensource.com> media: dvb_frontend: fix locking issues at dvb_frontend_get_event() Kai-Heng Feng <kai.heng.feng(a)canonical.com> media: cx231xx: Add support for AverMedia DVD EZMaker 7 Mauro Carvalho Chehab <mchehab(a)s-opensource.com> media: v4l2-compat-ioctl32: prevent go past max size Adrian Hunter <adrian.hunter(a)intel.com> perf intel-pt: Fix packet decoding of CYC packets Adrian Hunter <adrian.hunter(a)intel.com> perf intel-pt: Fix "Unexpected indirect branch" error Adrian Hunter <adrian.hunter(a)intel.com> perf intel-pt: Fix MTC timing after overflow Adrian Hunter <adrian.hunter(a)intel.com> perf intel-pt: Fix decoding to accept CBR between FUP and corresponding TIP Adrian Hunter <adrian.hunter(a)intel.com> perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT_TRACING Adrian Hunter <adrian.hunter(a)intel.com> perf tools: Fix symbol and object code resolution for vdso32 and vdsox32 Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> mfd: intel-lpss: Program REMAP register in PIO mode Johan Hovold <johan(a)kernel.org> backlight: tps65217_bl: Fix Device Tree node lookup Johan Hovold <johan(a)kernel.org> backlight: max8925_bl: Fix Device Tree node lookup Johan Hovold <johan(a)kernel.org> backlight: as3711_bl: Fix Device Tree node lookup Florian Westphal <fw(a)strlen.de> xfrm: skip policies marked as dead while rehashing Tobias Brunner <tobias(a)strongswan.org> xfrm: Ignore socket policies when rebuilding hash tables Silvio Cesare <silvio.cesare(a)gmail.com> UBIFS: Fix potential integer overflow in allocation Richard Weinberger <richard(a)nod.at> ubi: fastmap: Cancel work upon detach NeilBrown <neilb(a)suse.com> md: fix two problems with setting the "re-add" device state. Robert Elliott <elliott(a)hpe.com> linvdimm, pmem: Preserve read-only setting for pmem devices Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix missing REC trigger trace on enqueue without ERP thread Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix missing REC trigger trace for all objects in ERP_FAILED Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix missing REC trigger trace on terminate_rport_io for ERP_FAILED Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix missing REC trigger trace on terminate_rport_io early return Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix misleading REC trigger trace where erp_action setup failed Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix missing SCSI trace for retry of abort / scsi_eh TMF Steffen Maier <maier(a)linux.ibm.com> scsi: zfcp: fix missing SCSI trace for result of eh_host_reset_handler Himanshu Madhani <himanshu.madhani(a)cavium.com> scsi: qla2xxx: Fix setting lower transfer speed if GPSC fails Martin Kelly <mkelly(a)xevo.com> iio:buffer: make length types match kfifo types Omar Sandoval <osandov(a)fb.com> Btrfs: fix clone vs chattr NODATASUM race Geert Uytterhoeven <geert(a)linux-m68k.org> time: Make sure jiffies_to_msecs() preserves non-zero time periods Huacai Chen <chenhc(a)lemote.com> MIPS: io: Add barrier after register read in inX() Mika Westerberg <mika.westerberg(a)linux.intel.com> PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume Tokunori Ikegami <ikegami(a)allied-telesis.co.jp> MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum Joakim Tjernlund <joakim.tjernlund(a)infinera.com> mtd: cfi_cmdset_0002: Avoid walking all chips when unlocking. Joakim Tjernlund <joakim.tjernlund(a)infinera.com> mtd: cfi_cmdset_0002: Fix unlocking requests crossing a chip boudary Joakim Tjernlund <joakim.tjernlund(a)infinera.com> mtd: cfi_cmdset_0002: fix SEGV unlocking multiple chips Joakim Tjernlund <joakim.tjernlund(a)infinera.com> mtd: cfi_cmdset_0002: Use right chip in do_ppb_xxlock() Tokunori Ikegami <ikegami(a)allied-telesis.co.jp> mtd: cfi_cmdset_0002: Change write buffer to check correct value Leon Romanovsky <leonro(a)mellanox.com> RDMA/mlx4: Discard unknown SQP work requests Mike Marciniszyn <mike.marciniszyn(a)intel.com> IB/qib: Fix DMA api warning with debug kernel Stefan M Schaeckeler <sschaeck(a)cisco.com> of: unittest: for strings, account for trailing \0 in property length field David Rivshin <DRivshin(a)allworx.com> ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size Mahesh Salgaonkar <mahesh(a)linux.vnet.ibm.com> powerpc/fadump: Unregister fadump on kexec down path. Gautham R. Shenoy <ego(a)linux.vnet.ibm.com> cpuidle: powernv: Fix promotion from snooze if next state disabled Michael Neuling <mikey(a)neuling.org> powerpc/ptrace: Fix enforcement of DAWR constraints Michael Neuling <mikey(a)neuling.org> powerpc/ptrace: Fix setting 512B aligned breakpoints with PTRACE_SET_DEBUGREG Aneesh Kumar K.V <aneesh.kumar(a)linux.ibm.com> powerpc/mm/hash: Add missing isync prior to kernel stack SLB switch Miklos Szeredi <mszeredi(a)redhat.com> fuse: fix control dir setup and teardown Tetsuo Handa <penguin-kernel(a)I-love.SAKURA.ne.jp> fuse: don't keep dead fuse_conn at fuse_fill_super(). Miklos Szeredi <mszeredi(a)redhat.com> fuse: atomic_o_trunc should truncate pagecache Amit Pundir <amit.pundir(a)linaro.org> Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader Corey Minyard <cminyard(a)mvista.com> ipmi:bt: Set the timeout before doing a capabilities check Mikulas Patocka <mpatocka(a)redhat.com> branch-check: fix long->int truncation when profiling branches Matthias Schiffer <mschiffer(a)universe-factory.net> mips: ftrace: fix static function graph tracing Geert Uytterhoeven <geert+renesas(a)glider.be> lib/vsprintf: Remove atomic-unsafe support for %pCr Alexander Sverdlin <alexander.sverdlin(a)gmail.com> ASoC: cirrus: i2s: Fix {TX|RX}LinCtrlData setup Alexander Sverdlin <alexander.sverdlin(a)gmail.com> ASoC: cirrus: i2s: Fix LRCLK configuration Srinivas Kandagatla <srinivas.kandagatla(a)linaro.org> ASoC: dapm: delete dapm_kcontrol_data paths list before freeing it Ingo Flaschberger <ingo.flaschberger(a)gmail.com> 1wire: family module autoload fails because of upper/lower case mismatch. Maxim Moseychuk <franchesko.salias.hudro.pedros(a)gmail.com> usb: do not reset if a low-speed or full-speed device timed out Eric W. Biederman <ebiederm(a)xmission.com> signal/xtensa: Consistenly use SIGBUS in do_unaligned_user Daniel Wagner <daniel.wagner(a)siemens.com> serial: sh-sci: Use spin_{try}lock_irqsave instead of open coding version Michael Schmitz <schmitzmic(a)gmail.com> m68k/mm: Adjust VM area to be unmapped by gap size for __iounmap() Dan Williams <dan.j.williams(a)intel.com> x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec() Thadeu Lima de Souza Cascardo <cascardo(a)canonical.com> fs/binfmt_misc.c: do not allow offset overflow Stefan Potyra <Stefan.Potyra(a)elektrobit.com> w1: mxc_w1: Enable clock before calling clk_get_rate() on it Hans de Goede <hdegoede(a)redhat.com> libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk Dan Carpenter <dan.carpenter(a)oracle.com> libata: zpodd: small read overflow in eject_tray() Colin Ian King <colin.king(a)canonical.com> libata: zpodd: make arrays cdb static, reduces object code size Tao Wang <kevin.wangtao(a)hisilicon.com> cpufreq: Fix new policy initialization during limits updates via sysfs Dennis Wassenberg <dennis.wassenberg(a)secunet.com> ALSA: hda: add dock and led support for HP ProBook 640 G4 Dennis Wassenberg <dennis.wassenberg(a)secunet.com> ALSA: hda: add dock and led support for HP EliteBook 830 G5 Bo Chen <chenbo(a)pdx.edu> ALSA: hda - Handle kzalloc() failure in snd_hda_attach_pcm_stream() Qu Wenruo <wqu(a)suse.com> btrfs: scrub: Don't use inode pages for device replace Tetsuo Handa <penguin-kernel(a)I-love.SAKURA.ne.jp> driver core: Don't ignore class_dir_create_and_add() failure. Jan Kara <jack(a)suse.cz> ext4: fix fencepost error in check for inode count overflow during resize Lukas Czerner <lczerner(a)redhat.com> ext4: update mtime in ext4_punch_hole even if no blocks are released Frank van der Linden <fllinden(a)amazon.com> tcp: verify the checksum of the first data segment in a new connection Xiangning Yu <yuxiangning(a)gmail.com> bonding: re-evaluate force_primary when the primary slave name changes Daniel Glöckner <dg(a)emlix.com> usb: musb: fix remote wakeup racing with suspend Liu Bo <bo.li.liu(a)oracle.com> Btrfs: make raid6 rebuild retry more Eric Dumazet <edumazet(a)google.com> tcp: do not overshoot window_clamp in tcp_rcv_space_adjust() Sasha Levin <Alexander.Levin(a)microsoft.com> Revert "Btrfs: fix scrub to repair raid6 corruption" Finn Thain <fthain(a)telegraphics.com.au> net/sonic: Use dma_mapping_error() Josh Hill <josh(a)joshuajhill.com> net: qmi_wwan: Add Netgear Aircard 779S Ivan Bornyakov <brnkv.i1(a)gmail.com> atm: zatm: fix memcmp casting Julian Anastasov <ja(a)ssi.bg> ipvs: fix buffer overflow with sync daemon and service Paolo Abeni <pabeni(a)redhat.com> netfilter: ebtables: handle string from userspace with care Eric Dumazet <edumazet(a)google.com> xfrm6: avoid potential infinite loop in _decode_session6() ------------- Diffstat: Documentation/printk-formats.txt | 3 +- Makefile | 4 +- arch/arm/include/asm/kgdb.h | 2 +- arch/m68k/mm/kmap.c | 3 +- arch/mips/bcm47xx/setup.c | 6 + arch/mips/include/asm/io.h | 2 + arch/mips/include/asm/mipsregs.h | 3 + arch/mips/kernel/mcount.S | 27 ++--- arch/powerpc/kernel/entry_64.S | 1 + arch/powerpc/kernel/fadump.c | 3 + arch/powerpc/kernel/hw_breakpoint.c | 4 +- arch/powerpc/kernel/ptrace.c | 1 + arch/x86/include/asm/barrier.h | 2 +- arch/xtensa/kernel/traps.c | 2 +- drivers/ata/libata-core.c | 3 - drivers/ata/libata-zpodd.c | 4 +- drivers/atm/zatm.c | 4 +- drivers/base/core.c | 14 ++- drivers/bluetooth/hci_qca.c | 6 + drivers/char/ipmi/ipmi_bt_sm.c | 3 +- drivers/cpufreq/cpufreq.c | 2 + drivers/cpuidle/cpuidle-powernv.c | 32 +++++- drivers/iio/buffer/kfifo_buf.c | 4 +- drivers/infiniband/hw/mlx4/mad.c | 1 - drivers/infiniband/hw/qib/qib.h | 3 +- drivers/infiniband/hw/qib/qib_file_ops.c | 10 +- drivers/infiniband/hw/qib/qib_user_pages.c | 20 ++-- drivers/input/mouse/elan_i2c.h | 2 + drivers/input/mouse/elan_i2c_core.c | 3 +- drivers/input/mouse/elan_i2c_smbus.c | 10 +- drivers/input/mouse/elantech.c | 11 +- drivers/md/dm-thin.c | 11 +- drivers/md/md.c | 4 +- drivers/media/dvb-core/dvb_frontend.c | 23 ++-- drivers/media/usb/cx231xx/cx231xx-cards.c | 3 + drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 2 +- drivers/mfd/intel-lpss.c | 4 +- drivers/mtd/chips/cfi_cmdset_0002.c | 21 ++-- drivers/mtd/ubi/build.c | 3 + drivers/mtd/ubi/wl.c | 4 +- drivers/net/bonding/bond_options.c | 1 + drivers/net/ethernet/natsemi/sonic.c | 2 +- drivers/net/usb/cdc_ncm.c | 4 +- drivers/net/usb/qmi_wwan.c | 1 + drivers/nvdimm/bus.c | 14 ++- drivers/of/unittest.c | 8 +- drivers/pci/hotplug/pciehp.h | 2 +- drivers/pci/hotplug/pciehp_core.c | 2 +- drivers/pci/hotplug/pciehp_hpc.c | 13 ++- drivers/s390/scsi/zfcp_dbf.c | 40 +++++++ drivers/s390/scsi/zfcp_erp.c | 123 ++++++++++++++++----- drivers/s390/scsi/zfcp_ext.h | 5 + drivers/s390/scsi/zfcp_scsi.c | 18 ++- drivers/scsi/qla2xxx/qla_init.c | 3 +- drivers/spi/spi.c | 10 +- drivers/tty/serial/sh-sci.c | 8 +- drivers/usb/core/hub.c | 4 +- drivers/usb/musb/musb_host.c | 5 +- drivers/usb/musb/musb_host.h | 7 +- drivers/usb/musb/musb_virthub.c | 25 +++-- drivers/video/backlight/as3711_bl.c | 33 ++++-- drivers/video/backlight/max8925_bl.c | 4 +- drivers/video/backlight/tps65217_bl.c | 4 +- drivers/video/fbdev/uvesafb.c | 3 +- drivers/w1/masters/mxc_w1.c | 20 ++-- drivers/w1/w1.c | 2 +- drivers/xen/events/events_base.c | 2 - fs/binfmt_misc.c | 12 +- fs/btrfs/inode.c | 33 +++++- fs/btrfs/ioctl.c | 12 +- fs/btrfs/scrub.c | 2 +- fs/ext4/inode.c | 36 +++--- fs/ext4/resize.c | 2 +- fs/fuse/control.c | 13 ++- fs/fuse/dir.c | 13 ++- fs/fuse/inode.c | 1 + fs/nfs/nfs4idmap.c | 5 +- fs/nfsd/nfs4xdr.c | 5 +- fs/ubifs/journal.c | 2 +- fs/udf/directory.c | 3 + include/linux/blkdev.h | 4 +- include/linux/compiler.h | 2 +- include/linux/iio/buffer.h | 6 +- include/net/bluetooth/hci_core.h | 2 +- kernel/time/time.c | 6 +- lib/vsprintf.c | 3 - net/bluetooth/hci_conn.c | 27 +++-- net/bluetooth/hci_event.c | 15 ++- net/bridge/netfilter/ebtables.c | 3 +- net/ipv4/tcp_input.c | 2 +- net/ipv4/tcp_ipv4.c | 4 + net/ipv6/tcp_ipv6.c | 4 + net/ipv6/xfrm6_policy.c | 2 +- net/netfilter/ipvs/ip_vs_ctl.c | 21 +++- net/xfrm/xfrm_policy.c | 5 + sound/pci/hda/hda_controller.c | 4 +- sound/pci/hda/patch_conexant.c | 2 + sound/pci/hda/patch_realtek.c | 1 + sound/soc/cirrus/edb93xx.c | 2 +- sound/soc/cirrus/ep93xx-i2s.c | 26 +++-- sound/soc/cirrus/snappercl15.c | 2 +- sound/soc/soc-dapm.c | 2 + tools/perf/util/dso.c | 2 + .../perf/util/intel-pt-decoder/intel-pt-decoder.c | 23 +++- .../perf/util/intel-pt-decoder/intel-pt-decoder.h | 9 ++ .../util/intel-pt-decoder/intel-pt-pkt-decoder.c | 2 +- tools/perf/util/intel-pt.c | 5 + 107 files changed, 685 insertions(+), 273 deletions(-)

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