mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-16 19:13:39 -04:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

Browse Source 
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Update defconfigs
  [POWERPC] atomic_dec_if_positive sign extension fix
  [POWERPC] Fix OF node refcnt underflow in 836x and 832x platform code
  [POWERPC] Make it blatantly clear; mpc5200 device tree is not yet stable
  [POWERPC] Fix broken DMA on non-LPAR pSeries
  [POWERPC] Fix cell's mmio nvram to properly parse device tree
  [POWERPC] Remove bogus sanity check in pci -> OF node code
This commit is contained in:
Linus Torvalds
2007-01-22 09:21:02 -08:00
parent e45521a8d4 e89debcd18
commit b4a2c87dad
28 changed files with 1708 additions and 580 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/asm-powerpc/atomic.h
View File

@@ -207,7 +207,8 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
/*
* Atomically test *v and decrement if it is greater than 0.
* The function returns the old value of *v minus 1.
* The function returns the old value of *v minus 1, even if
* the atomic variable, v, was not decremented.
*/
static __inline__ int atomic_dec_if_positive(atomic_t *v)
{
@@ -216,14 +217,15 @@ static __inline__ int atomic_dec_if_positive(atomic_t *v)
__asm__ __volatile__(
LWSYNC_ON_SMP
"1: lwarx %0,0,%1 # atomic_dec_if_positive\n\
addic. %0,%0,-1\n\
cmpwi %0,1\n\
addi %0,%0,-1\n\
blt- 2f\n"
PPC405_ERR77(0,%1)
" stwcx. %0,0,%1\n\
bne- 1b"
ISYNC_ON_SMP
"\n\
2:" : "=&r" (t)
2:" : "=&b" (t)
: "r" (&v->counter)
: "cc", "memory");