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author | Ingo Molnar <mingo@elte.hu> | 2009-02-27 09:04:43 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-02-27 09:04:43 +0100 |
commit | f701d354075914296474d062f18fc8ee681a2318 (patch) | |
tree | 4c39db49f4bc9827a1a0dabc6a83fb30bd2c7ac4 /block/genhd.c | |
parent | Merge branch 'sched/clock' into tracing/ftrace (diff) | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable (diff) | |
download | linux-f701d354075914296474d062f18fc8ee681a2318.tar.xz linux-f701d354075914296474d062f18fc8ee681a2318.zip |
Merge branches 'tracing/ftrace' and 'linus' into tracing/core
Diffstat (limited to 'block/genhd.c')
-rw-r--r-- | block/genhd.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index e1eadcc9546a..a9ec910974c1 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -256,6 +256,22 @@ void blkdev_show(struct seq_file *seqf, off_t offset) } #endif /* CONFIG_PROC_FS */ +/** + * register_blkdev - register a new block device + * + * @major: the requested major device number [1..255]. If @major=0, try to + * allocate any unused major number. + * @name: the name of the new block device as a zero terminated string + * + * The @name must be unique within the system. + * + * The return value depends on the @major input parameter. + * - if a major device number was requested in range [1..255] then the + * function returns zero on success, or a negative error code + * - if any unused major number was requested with @major=0 parameter + * then the return value is the allocated major number in range + * [1..255] or a negative error code otherwise + */ int register_blkdev(unsigned int major, const char *name) { struct blk_major_name **n, *p; |