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and spinlock

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rsc 2007-08-10 17:17:57 +00:00
parent dca5b5ca2e
commit 2715cd3592
1 changed files with 4 additions and 1 deletions
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5
spinlock.c
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@ -22,8 +22,10 @@ initlock(struct spinlock *lock, char *name)
void void
getcallerpcs(void *v, uint pcs[]) getcallerpcs(void *v, uint pcs[])
{ {
uint *ebp = (uint*)v - 2; uint *ebp;
int i; int i;
ebp = (uint*)v - 2;
for(i = 0; i < 10; i++){ for(i = 0; i < 10; i++){
if(ebp == 0 || ebp == (uint*)0xffffffff) if(ebp == 0 || ebp == (uint*)0xffffffff)
break; break;
@ -88,3 +90,4 @@ holding(struct spinlock *lock)
{ {
return lock->locked && lock->cpu == cpu() + 10; return lock->locked && lock->cpu == cpu() + 10;
} }