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| author | Song Liu <[email protected]> | 2019-06-27 00:33:52 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2019-06-27 22:11:20 +0000 |
| commit | 83f44ae0f8afcc9da659799db8693f74847e66b3 (patch) | |
| tree | 97dbd7bf501484ccf72a747381e1b32c1c31e172 /lib/xarray.c | |
| parent | x86/speculation: Allow guests to use SSBD even if host does not (diff) | |
| download | kernel-83f44ae0f8afcc9da659799db8693f74847e66b3.tar.gz kernel-83f44ae0f8afcc9da659799db8693f74847e66b3.zip | |
perf/x86: Always store regs->ip in perf_callchain_kernel()
The stacktrace_map_raw_tp BPF selftest is failing because the RIP saved by
perf_arch_fetch_caller_regs() isn't getting saved by perf_callchain_kernel().
This was broken by the following commit:
d15d356887e7 ("perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER")
With that change, when starting with non-HW regs, the unwinder starts
with the current stack frame and unwinds until it passes up the frame
which called perf_arch_fetch_caller_regs(). So regs->ip needs to be
saved deliberately.
Fixes: d15d356887e7 ("perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER")
Signed-off-by: Song Liu <[email protected]>
Signed-off-by: Josh Poimboeuf <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Kairui Song <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Borislav Petkov <[email protected]>
Link: https://lkml.kernel.org/r/3975a298fa52b506fea32666d8ff6a13467eee6d.1561595111.git.jpoimboe@redhat.com
Diffstat (limited to 'lib/xarray.c')
0 files changed, 0 insertions, 0 deletions