diff options
| author |   Rob Clark <robdclark@chromium.org> | 2021-12-06 09:13:49 -0800 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-12-06 09:14:28 -0800 |
| commit | 83b965d118cbab1dbdfffdff8cabc8c1cfd183c6 (patch) | |
| tree | f46a8f6d854b05a47311125f6fd6b6081e79557a /arch/x86/kernel/process.c | |
| parent | mailmap: add and update email addresses (diff) | |
| parent | Merge tag 'drm-intel-next-2021-11-30' of git://anongit.freedesktop.org/drm/drm-intel into drm-next (diff) | |
| download | linux-dev-83b965d118cbab1dbdfffdff8cabc8c1cfd183c6.tar.xz linux-dev-83b965d118cbab1dbdfffdff8cabc8c1cfd183c6.zip | |
Merge remote-tracking branch 'drm/drm-next' into msm-next-staging
Backmerge drm-next to pull in:
8f59ee9a570c ("drm/msm/dsi: Adjust probe order")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'arch/x86/kernel/process.c')
| -rw-r--r-- | arch/x86/kernel/process.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index e9ee8b526319..04143a653a8a 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -964,6 +964,9 @@ unsigned long __get_wchan(struct task_struct *p) struct unwind_state state; unsigned long addr = 0; + if (!try_get_task_stack(p)) + return 0; + for (unwind_start(&state, p, NULL, NULL); !unwind_done(&state); unwind_next_frame(&state)) { addr = unwind_get_return_address(&state); @@ -974,6 +977,8 @@ unsigned long __get_wchan(struct task_struct *p) break; } + put_task_stack(p); + return addr; } |