The patch titled
avr32: fixup kprobes preemption handling
has been added to the -mm tree. Its filename is
avr32-fixup-kprobes-preemption-handling.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: avr32: fixup kprobes preemption handling
From: Paul Mundt <lethal@xxxxxxxxxxxx>
While working on SH kprobes, I noticed that avr32 got the preemption
handling wrong in the no probe case. The idea is that upon entry of
kprobe_handler() preemption is disabled outright across the life of the
kprobe, only to be re-enabled in post_kprobe_handler().
However, in the event that the probe is never activated, there's never any
chance of hitting the post probe handler, which allows for the current
avr32 implementation to disable preemption indefinitely, as it's currently
missing a re-enable when no probe is activated.
Signed-off-by: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/avr32/kernel/kprobes.c | 1 +
1 files changed, 1 insertion(+)
diff -puN arch/avr32/kernel/kprobes.c~avr32-fixup-kprobes-preemption-handling arch/avr32/kernel/kprobes.c
--- a/arch/avr32/kernel/kprobes.c~avr32-fixup-kprobes-preemption-handling
+++ a/arch/avr32/kernel/kprobes.c
@@ -154,6 +154,7 @@ ss_probe:
return 1;
no_kprobe:
+ preempt_enable_no_resched();
return ret;
}
_
Patches currently in -mm which might be from lethal@xxxxxxxxxxxx are
git-libata-all.patch
git-sh.patch
deal-with-cases-of-zone_dma-meaning-the-first-zone.patch
introduce-config_zone_dma.patch
optional-zone_dma-in-the-vm.patch
remove-zone_dma-remains-from-sh-sh64.patch
shared-page-table-for-hugetlb-page-v4.patch
htlb-forget-rss-with-pt-sharing.patch
avr32-fixup-kprobes-preemption-handling.patch
export-pm_suspend-for-the-shared-apm-emulation.patch
generic-ioremap_page_range-sh-conversion.patch
generic-ioremap_page_range-sh64-conversion.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
