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| author | John David Anglin <dave.anglin@bell.net> | 2020-10-02 21:16:49 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2020-10-15 08:10:39 +0200 |
| commit | 2a7d4eed5720d163f50b26892abe45b8cf40e849 (patch) | |
| tree | e10e31fa77c92081ab889c06cdac00d18b9f9dae /arch/parisc/lib | |
| parent | parisc: Fix comments and enable interrupts later (diff) | |
| download | linux-2a7d4eed5720d163f50b26892abe45b8cf40e849.tar.xz linux-2a7d4eed5720d163f50b26892abe45b8cf40e849.zip | |
parisc: Mark pointers volatile in __xchg8(), __xchg32() and __xchg64()
Let the complier treat the pointers volatile to ensure that they get
accessed atomicly.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/lib')
| -rw-r--r-- | arch/parisc/lib/bitops.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/parisc/lib/bitops.c b/arch/parisc/lib/bitops.c index 2e4d1f05a926..9ac683bf6ae7 100644 --- a/arch/parisc/lib/bitops.c +++ b/arch/parisc/lib/bitops.c @@ -18,7 +18,7 @@ arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = { #endif #ifdef CONFIG_64BIT -unsigned long __xchg64(unsigned long x, unsigned long *ptr) +unsigned long __xchg64(unsigned long x, volatile unsigned long *ptr) { unsigned long temp, flags; @@ -30,7 +30,7 @@ unsigned long __xchg64(unsigned long x, unsigned long *ptr) } #endif -unsigned long __xchg32(int x, int *ptr) +unsigned long __xchg32(int x, volatile int *ptr) { unsigned long flags; long temp; @@ -43,7 +43,7 @@ unsigned long __xchg32(int x, int *ptr) } -unsigned long __xchg8(char x, char *ptr) +unsigned long __xchg8(char x, volatile char *ptr) { unsigned long flags; long temp; |