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btree_write_buffer: ensure atomic64_sub_return_release availability

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prior to this patch, on certain platforms (ie: armv7l), compilation fails due
to atomic64_sub_return_release not being defined here. Ensure that the atomics
header is pulled in, and ensure that it is available in all cases, regardless
of whether ATOMIC64_SPINLOCK is defined.

Signed-off-by: Nicholas Sielicki <linux@opensource.nslick.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Nicholas Sielicki 2023-10-18 23:39:04 -05:00 committed by Kent Overstreet
parent 974d9bf000
commit 81352a29bc
2 changed files with 7 additions and 0 deletions
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6
include/linux/atomic.h
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@ -324,6 +324,12 @@ static inline s64 atomic64_cmpxchg_acquire(atomic64_t *v, s64 old, s64 new)
return atomic64_cmpxchg(v, old, new);
}
static inline s64 atomic64_sub_return_release(s64 i, atomic64_t *v)
{
smp_mb__before_atomic();
return atomic64_sub_return(i, v);
}
#endif
#endif /* __TOOLS_LINUX_ATOMIC_H */

1
libbcachefs/btree_write_buffer.c
View File

@ -9,6 +9,7 @@
#include "journal.h"
#include "journal_reclaim.h"
#include <linux/atomic.h>
#include <linux/sort.h>
static int btree_write_buffered_key_cmp(const void *_l, const void *_r)