linux-kernel - [tip:core/urgent] highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and KM_NMI

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Message-ID: <tip-d4515646699b6ad7b1a98ceb871296b957f3ef47@git.kernel.org>
Date:	Tue, 10 Nov 2009 03:19:44 GMT
From:	tip-bot for Soeren Sandmann <sandmann@...mi.au.dk>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	torvalds@...ux-foundation.org, sandmann@...hat.com,
	sandmann@...mi.au.dk, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:core/urgent] highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and KM_NMI_PTE

Commit-ID:  d4515646699b6ad7b1a98ceb871296b957f3ef47
Gitweb:     http://git.kernel.org/tip/d4515646699b6ad7b1a98ceb871296b957f3ef47
Author:     Soeren Sandmann <sandmann@...mi.au.dk>
AuthorDate: Wed, 28 Oct 2009 18:56:35 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 10 Nov 2009 04:15:47 +0100

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@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: a.p.zijlstra@...llo.nl
Cc: <stable@...nel.org> # .31.x
LKML-Reference: <ye8vdhz8krw.fsf@...el23.daimi.au.dk>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 mm/highmem.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/mm/highmem.c b/mm/highmem.c
index 33587de..9c1e627 100644
--- 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--;
--
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