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authorDenys Vlasenko <dvlasenk@redhat.com>2015-04-10 15:06:57 +0200
committerIngo Molnar <mingo@kernel.org>2015-04-11 13:08:53 +0200
commit5df71b396b2d1fdd9d9f5a33e2eda5dc27c5632d (patch)
treeef5f48fd8d5d65ca156c92017de1aa7b1f7bf70a /arch
parentaa21df0424468dbd991440d41ba0f700c5997103 (diff)
downloadkernel-5df71b396b2d1fdd9d9f5a33e2eda5dc27c5632d.tar.gz
perf/x86/64: Do report user_regs->cx while we are in syscall, in get_regs_user()
Yes, it is true that cx contains return address. It's not clear why we trash it. Stop doing that. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1428671219-29341-2-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/perf_regs.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kernel/perf_regs.c b/arch/x86/kernel/perf_regs.c
index 7ab198acc5b8..a8d4e4862ace 100644
--- a/arch/x86/kernel/perf_regs.c
+++ b/arch/x86/kernel/perf_regs.c
@@ -177,8 +177,6 @@ void perf_get_regs_user(struct perf_regs *regs_user,
* than just blindly copying user_regs.
*/
regs_user->abi = PERF_SAMPLE_REGS_ABI_64;
- /* usually contains return address (same as ->ip) */
- regs_user_copy->cx = -1;
} else {
/* We're probably in an interrupt or exception. */
regs_user->abi = user_64bit_mode(user_regs) ?