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authorKautuk Consul <consul.kautuk@gmail.com>2012-04-02 18:19:49 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-04-10 09:27:42 +0100
commitdff2aa7af8c96a11f75d858859f0e0c78b193d12 (patch)
tree3b88ae41a4d4571a48d03ad90c8955f3fffec77e /arch/arm/mm/fault.c
parent258f742635360175564e9470eb060ff4d4b984e7 (diff)
downloadop-kernel-dev-dff2aa7af8c96a11f75d858859f0e0c78b193d12.zip
op-kernel-dev-dff2aa7af8c96a11f75d858859f0e0c78b193d12.tar.gz
ARM: 7368/1: fault.c: correct how the tsk->[maj|min]_flt gets incremented
commit 8878a539ff19a43cf3729e7562cd528f490246ae was done by me to make the page fault handler retryable as well as interruptible. Due to this commit, there is a mistake in the way in which tsk->[maj|min]_flt counter gets incremented for VM_FAULT_ERROR: If VM_FAULT_ERROR is returned in the fault flags by handle_mm_fault, then either maj_flt or min_flt will get incremented. This is wrong as in the case of a VM_FAULT_ERROR we need to be skip ahead to the error handling code in do_page_fault. Added a check after the call to __do_page_fault() to check for (fault & VM_FAULT_ERROR). Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/fault.c')
-rw-r--r--arch/arm/mm/fault.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 9055b5a..f074675 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -320,7 +320,7 @@ retry:
*/
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
- if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (!(fault & VM_FAULT_ERROR) && flags & FAULT_FLAG_ALLOW_RETRY) {
if (fault & VM_FAULT_MAJOR) {
tsk->maj_flt++;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1,
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