[PATCH V8 2/8] fs: add field to superblock to support cleancache This second patch of eight in this cleancache series adds a field to the generic superblock to squirrel away a pool identifier that is dynamically provided by cleancache-enabled filesystems at mount time to uniquely identify files and pages belonging to this mounted filesystem. Details and a FAQ can be found in Documentation/vm/cleancache.txt [v8: trivial merge conflict update] Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> Reviewed-by: Jeremy Fitzhardinge <jeremy@xxxxxxxx> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: Matthew Wilcox <matthew@xxxxxx> Cc: Nick Piggin <npiggin@xxxxxxxxx> Cc: Mel Gorman <mel@xxxxxxxxx> Cc: Rik Van Riel <riel@xxxxxxxxxx> Cc: Jan Beulich <JBeulich@xxxxxxxxxx> Cc: Chris Mason <chris.mason@xxxxxxxxxx> Cc: Andreas Dilger <adilger@xxxxxxx> Cc: Ted Ts'o <tytso@xxxxxxx> Cc: Mark Fasheh <mfasheh@xxxxxxxx> Cc: Joel Becker <joel.becker@xxxxxxxxxx> Cc: Nitin Gupta <ngupta@xxxxxxxxxx> --- Diffstat: include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) --- linux-2.6.39-rc3/include/linux/fs.h 2011-04-11 18:21:51.000000000 -0600 +++ linux-2.6.39-rc3-cleancache/include/linux/fs.h 2011-04-13 16:46:44.444861817 -0600 @@ -1430,6 +1430,11 @@ struct super_block { */ char __rcu *s_options; const struct dentry_operations *s_d_op; /* default d_op for dentries */ + + /* + * Saved pool identifier for cleancache (-1 means none) + */ + int cleancache_poolid; }; extern struct timespec current_fs_time(struct super_block *sb); -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html