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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2008-07-25 01:48:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 10:53:44 -0700 |
| commit | 881adb85358309ea9c6f707394002719982ec607 (patch) | |
| tree | e4ffc2f6ca6013bab97bdb77b80e98b46a8d01e1 /include | |
| parent | 6e644c3126149b65460610fe5a00d8a162092abe (diff) | |
| download | linux-3.10-881adb85358309ea9c6f707394002719982ec607.tar.gz linux-3.10-881adb85358309ea9c6f707394002719982ec607.tar.bz2 linux-3.10-881adb85358309ea9c6f707394002719982ec607.zip | |
proc: always do ->release
Current two-stage scheme of removing PDE emphasizes one bug in proc:
open
rmmod
remove_proc_entry
close
->release won't be called because ->proc_fops were cleared. In simple
cases it's small memory leak.
For every ->open, ->release has to be done. List of openers is introduced
which is traversed at remove_proc_entry() if neeeded.
Discussions with Al long ago (sigh).
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/proc_fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h index cdabc2fc02f..f560d1705af 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -79,6 +79,7 @@ struct proc_dir_entry { int pde_users; /* number of callers into module in progress */ spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */ struct completion *pde_unload_completion; + struct list_head pde_openers; /* who did ->open, but not ->release */ }; struct kcore_list { |