]> git.karo-electronics.de Git - karo-tx-linux.git/commit
powerpc: Fix oops if scan_dispatch_log is called too early
authorAnton Blanchard <anton@samba.org>
Thu, 7 Apr 2011 21:44:21 +0000 (21:44 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 18 Apr 2011 03:08:19 +0000 (13:08 +1000)
commit84ffae55af79d7b8834fd0c08d0d1ebf2c77f91e
tree05eb620325efeac9cb2ddb4bc845416fdaf6c302
parent127493d5dc73589cbe00ea5ec8357cc2a4c0d82a
powerpc: Fix oops if scan_dispatch_log is called too early

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 <anton@samba.org>
Cc: <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/time.c