This is a note to let you know that I've just added the patch titled
sparc64: Like x86 we should check current->mm during perf backtrace
generation.
to the 3.6-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:
sparc64-like-x86-we-should-check-current-mm-during-perf-backtrace-generation.patch
and it can be found in the queue-3.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 3149157b67ae8b5a96dce0a444137248cd1c9672 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <[email protected]>
Date: Sun, 14 Oct 2012 17:59:40 -0700
Subject: sparc64: Like x86 we should check current->mm during perf backtrace
generation.
From: "David S. Miller" <[email protected]>
[ Upstream commit 08280e6c4c2e8049ac61d9e8e3536ec1df629c0d ]
If the MM is not active, only report the top-level PC. Do not try to
access the address space.
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/sparc/kernel/perf_event.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1426,8 +1426,6 @@ static void perf_callchain_user_64(struc
{
unsigned long ufp;
- perf_callchain_store(entry, regs->tpc);
-
ufp = regs->u_regs[UREG_I6] + STACK_BIAS;
do {
struct sparc_stackf *usf, sf;
@@ -1448,8 +1446,6 @@ static void perf_callchain_user_32(struc
{
unsigned long ufp;
- perf_callchain_store(entry, regs->tpc);
-
ufp = regs->u_regs[UREG_I6] & 0xffffffffUL;
do {
struct sparc_stackf32 *usf, sf;
@@ -1468,6 +1464,11 @@ static void perf_callchain_user_32(struc
void
perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
+ perf_callchain_store(entry, regs->tpc);
+
+ if (!current->mm)
+ return;
+
flushw_user();
if (test_thread_flag(TIF_32BIT))
perf_callchain_user_32(entry, regs);
Patches currently in stable-queue which might be from [email protected] are
queue-3.6/net-remove-skb-recycling.patch
queue-3.6/infiniband-pass-rdma_cm-module-to-netlink_dump_start.patch
queue-3.6/net-fix-skb_under_panic-oops-in-neigh_resolve_output.patch
queue-3.6/ipv4-fix-sending-of-redirects.patch
queue-3.6/ipvs-fix-arp-resolving-for-direct-routing-mode.patch
queue-3.6/ipv4-add-flowi_flag_known_nh.patch
queue-3.6/netlink-add-reference-of-module-in-netlink_dump_start.patch
queue-3.6/rds-fix-rds-ping-spinlock-recursion.patch
queue-3.6/sparc64-like-x86-we-should-check-current-mm-during-perf-backtrace-generation.patch
queue-3.6/sparc64-fix-ptrace-interaction-with-force_successful_syscall_return.patch
queue-3.6/ipv4-fix-forwarding-for-strict-source-routes.patch
queue-3.6/sparc64-fix-bit-twiddling-in-sparc_pmu_enable_event.patch
queue-3.6/skge-add-dma-mask-quirk-for-marvell-88e8001-on-asus-p5nsli-motherboard.patch
queue-3.6/ipv4-make-sure-nh_pcpu_rth_output-is-always-allocated.patch
queue-3.6/ipv6-gro-should-be-ecn-friendly.patch
queue-3.6/ipv4-always-invalidate-or-update-the-route-on-pmtu-events.patch
queue-3.6/ipv6-addrconf-fix-proc-net-if_inet6.patch
queue-3.6/ipv4-don-t-report-stale-pmtu-values-to-userspace.patch
queue-3.6/ipv4-don-t-create-nh-exeption-when-the-device-mtu-is-smaller-than-the-reported-pmtu.patch
queue-3.6/ipv4-introduce-rt_uses_gateway.patch
queue-3.6/vlan-don-t-deliver-frames-for-unknown-vlans-to-protocols.patch
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