| Message ID | 1373022125-24390-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 952a5a7..55790a5 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -824,6 +824,7 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) struct frame_tail __user *tail; + perf_callchain_store(entry, regs->ARM_pc); tail = (struct frame_tail __user *)regs->ARM_fp - 1; while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
This is a note to let you know that I have just added a patch titled ARM: 7765/1: perf: Record the user-mode PC in the call chain. to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From d2b67a59782bae9ff4393565cd04e5af14880074 Mon Sep 17 00:00:00 2001 From: Jed Davis <jld@mozilla.com> Date: Thu, 20 Jun 2013 10:16:29 +0100 Subject: [PATCH] ARM: 7765/1: perf: Record the user-mode PC in the call chain. commit c5f927a6f62196226915f12194c9d0df4e2210d7 upstream. With this change, we no longer lose the innermost entry in the user-mode part of the call chain. See also the x86 port, which includes the ip. It's possible to partially work around this problem by post-processing the data to use the PERF_SAMPLE_IP value, but this works only if the CPU wasn't in the kernel when the sample was taken. Signed-off-by: Jed Davis <jld@mozilla.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> [ luis: backported to 3.5: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- arch/arm/kernel/perf_event.c | 1 + 1 file changed, 1 insertion(+) -- 1.8.1.2