futex: Use atomic64_inc_return() in get_inode_sequence_number()

Use atomic64_inc_return(&ref) instead of atomic64_add_return(1, &ref)
to use optimized implementation and ease register pressure around
the primitive for targets that implement optimized variant.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: André Almeida <andrealmeid@igalia.com>
Link: https://lore.kernel.org/all/20241010071023.21913-1-ubizjak@gmail.com

diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 136768ae26375fafcebf8815ae965f13a3161adf..3146730e55f75a7d6474209813e09592b7472517 100644 (file)
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -181,7 +181,7 @@ static u64 get_inode_sequence_number(struct inode *inode)
                return old;
 
        for (;;) {
-               u64 new = atomic64_add_return(1, &i_seq);
+               u64 new = atomic64_inc_return(&i_seq);
                if (WARN_ON_ONCE(!new))
                        continue;