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LoongArch: Mark __xchg() and __cmpxchg() as __always_inline 

Commit ac7c3e4ff4 ("compiler: enable CONFIG_OPTIMIZE_INLINING
forcibly") allows compiler to uninline functions marked as 'inline'.
In case of __xchg()/__cmpxchg() this would cause to reference
BUILD_BUG(), which is an error case for catching bugs and will not
happen for correct code, if __xchg()/__cmpxchg() is inlined.

This bug can be produced with CONFIG_DEBUG_SECTION_MISMATCH enabled,
and the solution is similar to below commits:
46f1619500 ("MIPS: include: Mark __xchg as __always_inline"),
88356d0990 ("MIPS: include: Mark __cmpxchg as __always_inline").

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Huacai Chen 2022-10-12 16:36:08 +08:00
parent 1299a129a9
commit ddf502717d
1 changed files with 4 additions and 4 deletions
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8
arch/loongarch/include/asm/cmpxchg.h
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@ -61,8 +61,8 @@ static inline unsigned int __xchg_small(volatile void *ptr, unsigned int val,
return (old32 & mask) >> shift;
}
static inline unsigned long __xchg(volatile void *ptr, unsigned long x,
int size)
static __always_inline unsigned long
__xchg(volatile void *ptr, unsigned long x, int size)
{
switch (size) {
case 1:
@ -159,8 +159,8 @@ static inline unsigned int __cmpxchg_small(volatile void *ptr, unsigned int old,
return (old32 & mask) >> shift;
}
static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
unsigned long new, unsigned int size)
static __always_inline unsigned long
__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, unsigned int size)
{
switch (size) {
case 1: