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authorSteven Whitehouse <swhiteho@redhat.com>2006-08-04 15:41:22 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2006-08-04 15:41:22 -0400
commit59a1cc6bdabf5ed148b48808ad1a418d87f5e6bf (patch)
tree6463071a09201040267702e895d63359e62c393d /fs/gfs2/incore.h
parent899bb264507cfed83922bf14cd66a073494601ba (diff)
downloadop-kernel-dev-59a1cc6bdabf5ed148b48808ad1a418d87f5e6bf.zip
op-kernel-dev-59a1cc6bdabf5ed148b48808ad1a418d87f5e6bf.tar.gz
[GFS2] Fix lock ordering bug in page fault path
Mmapped files were able to trigger a lock ordering bug. Private maps do not need to take the glock so early on. Shared maps do unfortunately, however we can get around that by adding a flag into the flags for the struct gfs2_file. This only works because we are taking an exclusive lock at this point, so we know that nobody else can be racing with us. Fixes Red Hat bugzilla: #201196 Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/incore.h')
-rw-r--r--fs/gfs2/incore.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 90e0624..e98c14f 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -279,6 +279,7 @@ static inline struct gfs2_sbd *GFS2_SB(struct inode *inode)
enum {
GFF_DID_DIRECT_ALLOC = 0,
+ GFF_EXLOCK = 1,
};
struct gfs2_file {
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