diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-27 12:39:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-27 12:39:54 +0200 |
| commit | eea2c51f81df9df5123c042f07c7c6c33bf5fabb (patch) | |
| tree | 03fbe44c178809b9b5174b599528068ca91f35ce /arch/parisc/lib/bitops.c | |
| parent | 280c7f95f858b103e62d84cae2d5ed9f5cf54d41 (diff) | |
| parent | 92ed301919932f777713b9172e525674157e983d (diff) | |
Merge 5.8-rc7 into driver-core-next
We want the driver core fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/parisc/lib/bitops.c')
| -rw-r--r-- | arch/parisc/lib/bitops.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/parisc/lib/bitops.c b/arch/parisc/lib/bitops.c index 70ffbcf889b8..2e4d1f05a926 100644 --- a/arch/parisc/lib/bitops.c +++ b/arch/parisc/lib/bitops.c @@ -79,3 +79,15 @@ unsigned long __cmpxchg_u32(volatile unsigned int *ptr, unsigned int old, unsign _atomic_spin_unlock_irqrestore(ptr, flags); return (unsigned long)prev; } + +u8 __cmpxchg_u8(volatile u8 *ptr, u8 old, u8 new) +{ + unsigned long flags; + u8 prev; + + _atomic_spin_lock_irqsave(ptr, flags); + if ((prev = *ptr) == old) + *ptr = new; + _atomic_spin_unlock_irqrestore(ptr, flags); + return prev; +} |
