diff options
| author | Helge Deller <deller@gmx.de> | 2020-07-28 18:54:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-19 08:16:26 +0200 |
| commit | 431d999bd098144265fd399f16c888d01a12bc73 (patch) | |
| tree | 6267c41eb16695baeac0b894c5d622f4b6b7031b /arch/parisc/include | |
| parent | 7612ce180e30fa7f60731f12bf5d9d1664be60de (diff) | |
Revert "parisc: Use ldcw instruction for SMP spinlock release barrier"
commit 6e9f06ee6c9566f3606d93182ac8f803a148504b upstream.
This reverts commit 9e5c602186a692a7e848c0da17aed40f49d30519.
No need to use the ldcw instruction as SMP spinlock release barrier.
Revert it to gain back speed again.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v5.2+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/parisc/include')
| -rw-r--r-- | arch/parisc/include/asm/spinlock.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/parisc/include/asm/spinlock.h b/arch/parisc/include/asm/spinlock.h index 197d2247e4db..8a63515f03bf 100644 --- a/arch/parisc/include/asm/spinlock.h +++ b/arch/parisc/include/asm/spinlock.h @@ -37,11 +37,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *x) volatile unsigned int *a; a = __ldcw_align(x); -#ifdef CONFIG_SMP - (void) __ldcw(a); -#else mb(); -#endif *a = 1; } |