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author | Robert Peterson <rpeterso@redhat.com> | 2007-04-17 16:37:11 (GMT) |
---|---|---|
committer | Steven Whitehouse <swhiteho@redhat.com> | 2007-05-01 08:11:28 (GMT) |
commit | 7a0079d9e3fe8826475a08785f3d348c4b509774 (patch) | |
tree | 6b2d7e2b24989b8ad03b831e4fcaafcc3de00850 /fs | |
parent | 8fa1de386f4d72f0710b389ccf96308fef87df78 (diff) | |
download | linux-fsl-qoriq-7a0079d9e3fe8826475a08785f3d348c4b509774.tar.xz |
[GFS2] bz 236008: Kernel gpf doing cat /debugfs/gfs2/xxx (lock dump)
This is for Bugzilla Bug 236008: Kernel gpf doing cat /debugfs/gfs2/xxx
(lock dump) seen at the "gfs2 summit". This also fixes the bug that caused
garbage to be printed by the "initialized at" field. I apologize for the
kludge, but that code will all be ripped out anyway when the official
sprint_symbol function becomes available in the Linux kernel. I also
changed some formatting so that spaces are replaced by proper tabs.
Signed-off-by: Robert Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/gfs2/glock.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index d2e3094..b075f93 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1765,15 +1765,20 @@ static void gfs2_print_symbol(struct glock_iter *gi, const char *fmt, { /* when sprint_symbol becomes available in the new kernel, replace this */ /* function with: - char buffer[KSYM_SYMBOL_LEN]; + char buffer[KSYM_SYMBOL_LEN]; - sprint_symbol(buffer, address); - print_dbg(gi, fmt, buffer); + sprint_symbol(buffer, address); + print_dbg(gi, fmt, buffer); */ - if (gi) - print_dbg(gi, fmt, address); - else - print_symbol(fmt, address); + char buffer[256]; + + if (gi) { + memset(buffer, 0, sizeof(buffer)); + sprintf(buffer, "%p", address); + print_dbg(gi, fmt, buffer); + } + else + print_symbol(fmt, address); } /** @@ -1993,14 +1998,19 @@ int __init gfs2_glock_init(void) static int gfs2_glock_iter_next(struct glock_iter *gi) { + read_lock(gl_lock_addr(gi->hash)); while (1) { if (!gi->hb_list) { /* If we don't have a hash bucket yet */ gi->hb_list = &gl_hash_table[gi->hash].hb_list; if (hlist_empty(gi->hb_list)) { + read_unlock(gl_lock_addr(gi->hash)); gi->hash++; + read_lock(gl_lock_addr(gi->hash)); gi->hb_list = NULL; - if (gi->hash >= GFS2_GL_HASH_SIZE) + if (gi->hash >= GFS2_GL_HASH_SIZE) { + read_unlock(gl_lock_addr(gi->hash)); return 1; + } else continue; } @@ -2011,7 +2021,9 @@ static int gfs2_glock_iter_next(struct glock_iter *gi) } } else { if (gi->gl->gl_list.next == NULL) { + read_unlock(gl_lock_addr(gi->hash)); gi->hash++; + read_lock(gl_lock_addr(gi->hash)); gi->hb_list = NULL; continue; } @@ -2021,6 +2033,7 @@ static int gfs2_glock_iter_next(struct glock_iter *gi) if (gi->gl) break; } + read_unlock(gl_lock_addr(gi->hash)); return 0; } |