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| author | David S. Miller <davem@davemloft.net> | 2017-09-28 08:38:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-21 11:49:24 +0300 |
| commit | 05e15a59eef1f87d0f50b592546b2c1fa64abbd4 (patch) | |
| tree | 25fb0d575cb6762b22b092d31b9d4786413557b3 /arch/sparc/lib | |
| parent | 9aacd82304adb74fa9320cb1c5d4bc71b1b91f06 (diff) | |
| download | linux-05e15a59eef1f87d0f50b592546b2c1fa64abbd4.tar.xz | |
sparc32: Add cmpxchg64().
commit 23198ddffb6cddb5d5824230af4dd4b46e4046a4 upstream.
This fixes the build with i40e driver enabled.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/sparc/lib')
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index 5010df497387..465a901a0ada 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -173,6 +173,20 @@ unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new) } EXPORT_SYMBOL(__cmpxchg_u32); +u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new) +{ + unsigned long flags; + u64 prev; + + spin_lock_irqsave(ATOMIC_HASH(ptr), flags); + if ((prev = *ptr) == old) + *ptr = new; + spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags); + + return prev; +} +EXPORT_SYMBOL(__cmpxchg_u64); + unsigned long __xchg_u32(volatile u32 *ptr, u32 new) { unsigned long flags; |