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Diffstat (limited to 'arch/arm64/include/asm/spinlock.h')
-rw-r--r--arch/arm64/include/asm/spinlock.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h
index fdb827c7832f..ebdae15d665d 100644
--- a/arch/arm64/include/asm/spinlock.h
+++ b/arch/arm64/include/asm/spinlock.h
@@ -87,8 +87,8 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock)
" cbnz %w1, 1f\n"
" add %w1, %w0, %3\n"
" casa %w0, %w1, %2\n"
- " and %w1, %w1, #0xffff\n"
- " eor %w1, %w1, %w0, lsr #16\n"
+ " sub %w1, %w1, %3\n"
+ " eor %w1, %w1, %w0\n"
"1:")
: "=&r" (lockval), "=&r" (tmp), "+Q" (*lock)
: "I" (1 << TICKET_SHIFT)