This is a note to let you know that I've just added the patch titled
powerpc: Fix oops if scan_dispatch_log is called too early
to the 2.6.38-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-fix-oops-if-scan_dispatch_log-is-called-too-early.patch
and it can be found in the queue-2.6.38 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 84ffae55af79d7b8834fd0c08d0d1ebf2c77f91e Mon Sep 17 00:00:00 2001
From: Anton Blanchard <[email protected]>
Date: Thu, 7 Apr 2011 21:44:21 +0000
Subject: powerpc: Fix oops if scan_dispatch_log is called too early
From: Anton Blanchard <[email protected]>
commit 84ffae55af79d7b8834fd0c08d0d1ebf2c77f91e upstream.
We currently enable interrupts before the dispatch log for the boot
cpu is setup. If a timer interrupt comes in early enough we oops in
scan_dispatch_log:
Unable to handle kernel paging request for data at address 0x00000010
...
.scan_dispatch_log+0xb0/0x170
.account_system_vtime+0xa0/0x220
.irq_enter+0x88/0xc0
.do_IRQ+0x48/0x230
The patch below adds a check to scan_dispatch_log to ensure the
dispatch log has been allocated.
Signed-off-by: Anton Blanchard <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/powerpc/kernel/time.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -229,6 +229,9 @@ static u64 scan_dispatch_log(u64 stop_tb
u64 stolen = 0;
u64 dtb;
+ if (!dtl)
+ return 0;
+
if (i == vpa->dtl_idx)
return 0;
while (i < vpa->dtl_idx) {
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.38/powerpc-fix-oops-if-scan_dispatch_log-is-called-too-early.patch
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