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| author | Aleksandr Nogikh <[email protected]> | 2022-03-23 23:07:15 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2022-03-24 02:00:35 +0000 |
| commit | b3d7fe86fbd06638c71dd851ba921adf50d912ce (patch) | |
| tree | ac567b3981ea70b0ebfca87372d8e361392b93a7 /drivers/gpu/drm/amd/amdgpu/amdgpu_trace_points.c | |
| parent | kcov: split ioctl handling into locked and unlocked parts (diff) | |
| download | kernel-b3d7fe86fbd06638c71dd851ba921adf50d912ce.tar.gz kernel-b3d7fe86fbd06638c71dd851ba921adf50d912ce.zip | |
kcov: properly handle subsequent mmap calls
Allocate the kcov buffer during KCOV_MODE_INIT in order to untie mmapping
of a kcov instance and the actual coverage collection process. Modify
kcov_mmap, so that it can be reliably used any number of times once
KCOV_MODE_INIT has succeeded.
These changes to the user-facing interface of the tool only weaken the
preconditions, so all existing user space code should remain compatible
with the new version.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Aleksandr Nogikh <[email protected]>
Reviewed-by: Dmitry Vyukov <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Marco Elver <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Taras Madan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_trace_points.c')
0 files changed, 0 insertions, 0 deletions