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seqlock: Allow KASAN to fail optimizing

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Some KASAN builds are failing to properly optimize this code --
luckily we don't care about core quality for KASAN builds, so just
exclude it.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Closes: https://lore.kernel.org/oe-kbuild-all/202510251641.idrNXhv5-lkp@intel.com/
This commit is contained in:
Peter Zijlstra
2025-10-28 09:56:38 +01:00
parent 37d0472c8a
commit b94d45b6bb
1 changed files with 4 additions and 1 deletions
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5
include/linux/seqlock.h
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@@ -1234,11 +1234,14 @@ static inline void __scoped_seqlock_cleanup(struct ss_tmp *sst)
extern void __scoped_seqlock_invalid_target(void);
#if defined(CONFIG_CC_IS_GCC) && CONFIG_GCC_VERSION < 90000
#if (defined(CONFIG_CC_IS_GCC) && CONFIG_GCC_VERSION < 90000) || defined(CONFIG_KASAN)
/*
* For some reason some GCC-8 architectures (nios2, alpha) have trouble
* determining that the ss_done state is impossible in __scoped_seqlock_next()
* below.
*
* Similarly KASAN is known to confuse compilers enough to break this. But we
* don't care about code quality for KASAN builds anyway.
*/
static inline void __scoped_seqlock_bug(void) { }
#else