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| author | Jiri Slaby <jirislaby@gmail.com> | 2007-02-12 00:55:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 09:48:42 -0800 |
| commit | c4f28e54d61278203c2bb2aea0679e0a738235d2 (patch) | |
| tree | d92cf0718084a4e659444741443ee38afb847836 /include/video/neomagic.h | |
| parent | 52e7c922f37907ab3cf3445b916fbbc53cbd6c75 (diff) | |
| download | lwn-c4f28e54d61278203c2bb2aea0679e0a738235d2.tar.gz lwn-c4f28e54d61278203c2bb2aea0679e0a738235d2.zip | |
[PATCH] Video: fb, add true ref_count atomicity
Some of fb drivers uses atomic_t in bad manner, since there are still some
race-prone gaps. Use mutexes to protect open/close code sections with
ref_count testing and finally use simple uint.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Denis Oliver Kropp <dok@directfb.org>
Cc: James Simmons <jsimmons@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/video/neomagic.h')
| -rw-r--r-- | include/video/neomagic.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/video/neomagic.h b/include/video/neomagic.h index 78b1f15a538f..a9e118a1cd16 100644 --- a/include/video/neomagic.h +++ b/include/video/neomagic.h @@ -140,7 +140,8 @@ typedef volatile struct { struct neofb_par { struct vgastate state; - atomic_t ref_count; + struct mutex open_lock; + unsigned int ref_count; unsigned char MiscOutReg; /* Misc */ unsigned char CRTC[25]; /* Crtc Controller */ |