Export the symbol __cmpxchg_small() for btrfs.ko that will use it to store blk_status_t, which is u8. Reported by LKP: >> ERROR: modpost: "__cmpxchg_small" [fs/btrfs/btrfs.ko] undefined! Patch using the cmpxchg() https://lore.kernel.org/linux-btrfs/1d4f72f7fee285b2ddf4bf62b0ac0fd89def5417.1728575379.git.naohiro.aota@xxxxxxx/ Link: https://lore.kernel.org/all/20241016134919.GO1609@xxxxxxx/ Signed-off-by: David Sterba <dsterba@xxxxxxxx> --- I can merge it via the btrfs git tree along the fix or wait until it's merged the usual way, please let me know. arch/mips/kernel/cmpxchg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/mips/kernel/cmpxchg.c b/arch/mips/kernel/cmpxchg.c index e974a4954df8..c371def2302d 100644 --- a/arch/mips/kernel/cmpxchg.c +++ b/arch/mips/kernel/cmpxchg.c @@ -102,3 +102,4 @@ unsigned long __cmpxchg_small(volatile void *ptr, unsigned long old, return old; } } +EXPORT_SYMBOL(__cmpxchg_small); -- 2.45.0
