kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

powerpc: Fixup oddity in entry_32.S

Browse source 
When I "fixed" the CONFIG_TRACE_IRQFLAGS case on interrupt entry,
I screwed up a little bit with the test for user space vs. kernel.

The code is fine, there's just some dead code around it. I basically
removed the test and always create the added stack frame whether
coming from user or kernel since in any case we do need to save
a bunch of volatile registers or bad things would happen (we can
take page faults in the kernel for example).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2012-07-01 18:47:17 +00:00
parent 9778b696a0
commit 8bf8385b9c
1 changed files with 0 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
arch/powerpc/kernel/entry_32.S
View file

@ -226,13 +226,7 @@ reenable_mmu: /* re-enable mmu so we can */
stw r3,16(r1)
stw r4,20(r1)
stw r5,24(r1)
andi. r12,r12,MSR_PR
b 11f
bl trace_hardirqs_off
b 12f
11:
bl trace_hardirqs_off
12:
lwz r5,24(r1)
lwz r4,20(r1)
lwz r3,16(r1)