diff options
| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-29 14:03:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-29 14:03:42 -0700 |
| commit | 6e98ee75c3ab99db48ecc0615c2246dc193111a9 (patch) | |
| tree | afdad9dc968ebef3787e7dc16a41290a525f18f5 /arch/sparc/lib/atomic32.c | |
| parent | 486b4ce13221aa6cd0cbc9fff6993f444d8a52b5 (diff) | |
| parent | 7db35f31cbb8ca1dbaba03d74b7db79ace084358 (diff) | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC64]: Fill holes in hypervisor APIs and fix KTSB registry.
[SPARC64]: Fix two bugs wrt. kernel 4MB TSB.
[SPARC]: Mark as emulating cmpxchg, add appropriate depends for DRM.
[SPARC]: Emulate cmpxchg like parisc
[SPARC64]: Fix _PAGE_EXEC_4U check in sun4u I-TLB miss handler.
[SPARC]: Linux always started with 9600 8N1
[SPARC64]: arch/sparc64/time.c doesn't compile on Ultra 1 (no PCI)
[SPARC64]: Eliminate NR_CPUS limitations.
[SPARC64]: Use machine description and OBP properly for cpu probing.
[SPARC64]: Negotiate hypervisor API for PCI services.
[SPARC64]: Report proper system soft state to the hypervisor.
[SPARC64]: Fix typo in sun4v_hvapi_register error handling.
[SCSI] ESP: Kill SCSI_ESP_CORE and link directly just like jazz_esp
[SCSI] jazz_esp: Converted to use esp_core.
[SPARC64]: PCI device scan is way too verbose by default.
[SERIAL] sunzilog: section mismatch fix
[SPARC32]: Removes mismatch section warnigs in sparc time.c file
[SPARC64]: Don't be picky about virtual-dma values on sun4v.
[SPARC64]: Kill unused DIE_PAGE_FAULT enum value.
[SCSI] pluto: Use wait_for_completion_timeout.
Diffstat (limited to 'arch/sparc/lib/atomic32.c')
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index 559335f4917..617d29832e1 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -2,6 +2,7 @@ * atomic32.c: 32-bit atomic_t implementation * * Copyright (C) 2004 Keith M Wesolowski + * Copyright (C) 2007 Kyle McMartin * * Based on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf */ @@ -117,3 +118,17 @@ unsigned long ___change_bit(unsigned long *addr, unsigned long mask) return old & mask; } EXPORT_SYMBOL(___change_bit); + +unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new) +{ + unsigned long flags; + u32 prev; + + spin_lock_irqsave(ATOMIC_HASH(addr), flags); + if ((prev = *ptr) == old) + *ptr = new; + spin_unlock_irqrestore(ATOMIC_HASH(addr), flags); + + return (unsigned long)prev; +} +EXPORT_SYMBOL(__cmpxchg_u32); |