highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and KM_NMI_PTE

Previously calling debug_kmap_atomic() with these types would
cause spurious warnings.

(triggered by SysProf using perf events)

Signed-off-by: Soeren Sandmann Pedersen <sandmann@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: a.p.zijlstra@chello.nl
Cc: <stable@kernel.org> # .31.x
LKML-Reference: <ye8vdhz8krw.fsf@camel23.daimi.au.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/mm/highmem.c b/mm/highmem.c
index 33587de..9c1e627 100644 (file)
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -432,10 +432,15 @@ void debug_kmap_atomic(enum km_type type)
                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--;