commit d6ffe6067a54972564552ea45d320fb98db1ac5e upstream.

Some architectures define their own arch_test_bit and they also need arch_test_bit_acquire, otherwise they won't compile. We also clean up the code by using the generic test_bit if that is equivalent to the arch-specific version.

Signed-off-by: Mikulas Patocka mpatocka@redhat.com Cc: stable@vger.kernel.org Fixes: 8238b4579866 ("wait_on_bit: add an acquire memory barrier") Signed-off-by: Linus Torvalds torvalds@linux-foundation.org

--- arch/alpha/include/asm/bitops.h | 8 +++----- arch/arc/include/asm/bitops.h | 17 +++-------------- arch/h8300/include/asm/bitops.h | 3 ++- arch/hexagon/include/asm/bitops.h | 15 +++++++++++++++ arch/ia64/include/asm/bitops.h | 8 +++----- arch/m68k/include/asm/bitops.h | 8 +++----- arch/s390/include/asm/bitops.h | 12 +++--------- arch/sh/include/asm/bitops-op32.h | 11 ++--------- 8 files changed, 34 insertions(+), 48 deletions(-)

Index: linux-stable/arch/alpha/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/alpha/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/alpha/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -8,6 +8,7 @@

#include <asm/compiler.h> #include <asm/barrier.h> +#include <asm-generic/bitops/generic-non-atomic.h>

/* * Copyright 1994, Linus Torvalds. @@ -283,11 +284,8 @@ __test_and_change_bit(unsigned long nr, return (old & mask) != 0; }

-static inline int -test_bit(int nr, const volatile void * addr) -{ - return (1UL & (((const int *) addr)[nr >> 5] >> (nr & 31))) != 0UL; -} +#define test_bit generic_test_bit +#define test_bit_acquire generic_test_bit_acquire

/* * ffz = Find First Zero in word. Undefined if no zero exists, Index: linux-stable/arch/hexagon/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/hexagon/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/hexagon/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -172,7 +172,22 @@ static inline int __test_bit(int nr, con return retval; }

+static inline int __test_bit_acquire(int nr, const volatile unsigned long *addr) +{ + int retval; + + asm volatile( + "{P0 = tstbit(%1,%2); if (P0.new) %0 = #1; if (!P0.new) %0 = #0;}\n" + : "=&r" (retval) + : "r" (addr[BIT_WORD(nr)]), "r" (nr % BITS_PER_LONG) + : "p0", "memory" + ); + + return retval; +} + #define test_bit(nr, addr) __test_bit(nr, addr) +#define test_bit_acquire(nr, addr) __test_bit_acquire(nr, addr)

/* * ffz - find first zero in word. Index: linux-stable/arch/ia64/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/ia64/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/ia64/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -18,6 +18,7 @@ #include <linux/types.h> #include <asm/intrinsics.h> #include <asm/barrier.h> +#include <asm-generic/bitops/generic-non-atomic.h>

/** * set_bit - Atomically set a bit in memory @@ -331,11 +332,8 @@ __test_and_change_bit (int nr, void *add return (old & bit) != 0; }

-static __inline__ int -test_bit (int nr, const volatile void *addr) -{ - return 1 & (((const volatile __u32 *) addr)[nr >> 5] >> (nr & 31)); -} +#define test_bit generic_test_bit +#define test_bit_acquire generic_test_bit_acquire

/** * ffz - find the first zero bit in a long word Index: linux-stable/arch/m68k/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/m68k/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/m68k/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -14,6 +14,7 @@

#include <linux/compiler.h> #include <asm/barrier.h> +#include <asm-generic/bitops/generic-non-atomic.h>

/* * Bit access functions vary across the ColdFire and 68k families. @@ -148,11 +149,8 @@ static inline void bfchg_mem_change_bit( #define __change_bit(nr, vaddr) change_bit(nr, vaddr)

-static inline int test_bit(int nr, const volatile unsigned long *vaddr) -{ - return (vaddr[nr >> 5] & (1UL << (nr & 31))) != 0; -} - +#define test_bit generic_test_bit +#define test_bit_acquire generic_test_bit_acquire

static inline int bset_reg_test_and_set_bit(int nr, volatile unsigned long *vaddr) Index: linux-stable/arch/s390/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/s390/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/s390/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -38,6 +38,7 @@ #include <linux/types.h> #include <asm/atomic_ops.h> #include <asm/barrier.h> +#include <asm-generic/bitops/generic-non-atomic.h>

#define __BITOPS_WORDS(bits) (((bits) + BITS_PER_LONG - 1) / BITS_PER_LONG)

@@ -209,15 +210,8 @@ static inline bool arch___test_and_chang return (ch >> (nr & 7)) & 1; }

-static inline bool arch_test_bit(unsigned long nr, - const volatile unsigned long *ptr) -{ - const volatile unsigned char *addr; - - addr = ((const volatile unsigned char *)ptr); - addr += (nr ^ (BITS_PER_LONG - 8)) >> 3; - return (*addr >> (nr & 7)) & 1; -} +#define arch_test_bit generic_test_bit +#define test_bit_acquire generic_test_bit_acquire

static inline bool arch_test_and_set_bit_lock(unsigned long nr, volatile unsigned long *ptr) Index: linux-stable/arch/sh/include/asm/bitops-op32.h =================================================================== --- linux-stable.orig/arch/sh/include/asm/bitops-op32.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/sh/include/asm/bitops-op32.h 2022-11-14 22:16:37.000000000 +0100 @@ -130,14 +130,7 @@ static inline int __test_and_change_bit( return (old & mask) != 0; }

-/** - * test_bit - Determine whether a bit is set - * @nr: bit number to test - * @addr: Address to start counting from - */ -static inline int test_bit(int nr, const volatile unsigned long *addr) -{ - return 1UL & (addr[BIT_WORD(nr)] >> (nr & (BITS_PER_LONG-1))); -} +#define test_bit generic_test_bit +#define test_bit_acquire generic_test_bit_acquire

#endif /* __ASM_SH_BITOPS_OP32_H */ Index: linux-stable/arch/h8300/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/h8300/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/h8300/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -83,7 +83,8 @@ static inline int test_bit(int nr, const return ret; }

-#define __test_bit(nr, addr) test_bit(nr, addr) +#define __test_bit(nr, addr) test_bit(nr, addr) +#define test_bit_acquire(nr, addr) test_bit(nr, addr)

#define H8300_GEN_TEST_BITOP(FNNAME, OP) \ static inline int FNNAME(int nr, void *addr) \ Index: linux-stable/arch/arc/include/asm/bitops.h =================================================================== --- linux-stable.orig/arch/arc/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 +++ linux-stable/arch/arc/include/asm/bitops.h 2022-11-14 22:16:37.000000000 +0100 @@ -18,6 +18,7 @@ #ifndef CONFIG_ARC_HAS_LLSC #include <asm/smp.h> #endif +#include <asm-generic/bitops/generic-non-atomic.h>

#ifdef CONFIG_ARC_HAS_LLSC

@@ -236,20 +237,8 @@ BIT_OPS(clear, & ~, CTOP_INST_AAND_DI_R2 BIT_OPS(change, ^, CTOP_INST_AXOR_DI_R2_R2_R3) #endif

-/* - * This routine doesn't need to be atomic. - */ -static inline int -test_bit(unsigned int nr, const volatile unsigned long *addr) -{ - unsigned long mask; - - addr += nr >> 5; - - mask = 1UL << (nr & 0x1f); - - return ((mask & *addr) != 0); -} +#define test_bit generic_test_bit +#define test_bit_acquire generic_test_bit_acquire

#ifdef CONFIG_ISA_ARCOMPACT