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| author | Oleg Nesterov <oleg@redhat.com> | 2015-11-06 16:32:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-06 17:50:42 -0800 |
| commit | 2e01fabe67ccaff1d59bda01e60a61f5fb0aa7b6 (patch) | |
| tree | 4db02540f4e0f4f3981965b86ee43cbd88ae517e /include/drm | |
| parent | 4f05028f8d1af782cfd03d09e0a052e9745dc5ad (diff) | |
| download | linux-2e01fabe67ccaff1d59bda01e60a61f5fb0aa7b6.tar.gz linux-2e01fabe67ccaff1d59bda01e60a61f5fb0aa7b6.tar.bz2 linux-2e01fabe67ccaff1d59bda01e60a61f5fb0aa7b6.zip | |
signals: kill block_all_signals() and unblock_all_signals()
It is hardly possible to enumerate all problems with block_all_signals()
and unblock_all_signals(). Just for example,
1. block_all_signals(SIGSTOP/etc) simply can't help if the caller is
multithreaded. Another thread can dequeue the signal and force the
group stop.
2. Even is the caller is single-threaded, it will "stop" anyway. It
will not sleep, but it will spin in kernel space until SIGCONT or
SIGKILL.
And a lot more. In short, this interface doesn't work at all, at least
the last 10+ years.
Daniel said:
Yeah the only times I played around with the DRM_LOCK stuff was when
old drivers accidentally deadlocked - my impression is that the entire
DRM_LOCK thing was never really tested properly ;-) Hence I'm all for
purging where this leaks out of the drm subsystem.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Dave Airlie <airlied@redhat.com>
Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drmP.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 8b5ce7c5d9bb..f56cdcecc1c9 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -822,7 +822,6 @@ struct drm_device { struct drm_sg_mem *sg; /**< Scatter gather memory */ unsigned int num_crtcs; /**< Number of CRTCs on this device */ - sigset_t sigmask; struct { int context; |