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Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and KM_NMI_PTE
  highmem: Fix race in debug_kmap_atomic() which could cause warn_count to underflow
  rcu: Fix long-grace-period race between forcing and initialization
  uids: Prevent tear down race
This commit is contained in:
Linus Torvalds
2009-11-11 11:30:15 -08:00
parent 1fd18a871a d451564669
commit 961767b75d
4 changed files with 28 additions and 14 deletions
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17
mm/highmem.c
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@ -426,16 +426,21 @@ void __init page_address_init(void)
void debug_kmap_atomic(enum km_type type)
{
static unsigned warn_count = 10;
static int warn_count = 10;
if (unlikely(warn_count == 0))
if (unlikely(warn_count < 0))
return;
if (unlikely(in_interrupt())) {
if (in_irq()) {
if (in_nmi()) {
if (type != KM_NMI && type != KM_NMI_PTE) {
WARN_ON(1);
warn_count--;
}
} else if (in_irq()) {
if (type != KM_IRQ0 && type != KM_IRQ1 &&
type != KM_BIO_SRC_IRQ && type != KM_BIO_DST_IRQ &&
type != KM_BOUNCE_READ) {
type != KM_BOUNCE_READ && type != KM_IRQ_PTE) {
WARN_ON(1);
warn_count--;
}
@ -452,7 +457,9 @@ void debug_kmap_atomic(enum km_type type)
}
if (type == KM_IRQ0 || type == KM_IRQ1 || type == KM_BOUNCE_READ ||
type == KM_BIO_SRC_IRQ || type == KM_BIO_DST_IRQ) {
type == KM_BIO_SRC_IRQ || type == KM_BIO_DST_IRQ ||
type == KM_IRQ_PTE || type == KM_NMI ||
type == KM_NMI_PTE ) {
if (!irqs_disabled()) {
WARN_ON(1);
warn_count--;