diff options
| author | Christoph Hellwig <hch@infradead.org> | 2014-01-30 15:45:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 16:56:54 -0800 |
| commit | 6897fc22ea01b562b55c6168592bcbd3ee62b006 (patch) | |
| tree | 034c4b774880c2bbf8a9347acef749478a3443b0 /include | |
| parent | 0c692d07842a67d9aa6b8266a80e4ac460a5c1a2 (diff) | |
| download | linux-6897fc22ea01b562b55c6168592bcbd3ee62b006.tar.bz2 | |
kernel: use lockless list for smp_call_function_single
Make smp_call_function_single and friends more efficient by using a
lockless list.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
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/blkdev.h | 5 | ||||
| -rw-r--r-- | include/linux/smp.h | 6 |
2 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 0375654adb28..8678c4322b44 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -95,10 +95,7 @@ enum rq_cmd_type_bits { * as well! */ struct request { - union { - struct list_head queuelist; - struct llist_node ll_list; - }; + struct list_head queuelist; union { struct call_single_data csd; struct work_struct mq_flush_data; diff --git a/include/linux/smp.h b/include/linux/smp.h index 5da22ee42e16..3834f43f9993 100644 --- a/include/linux/smp.h +++ b/include/linux/smp.h @@ -11,12 +11,16 @@ #include <linux/list.h> #include <linux/cpumask.h> #include <linux/init.h> +#include <linux/llist.h> extern void cpu_idle(void); typedef void (*smp_call_func_t)(void *info); struct call_single_data { - struct list_head list; + union { + struct list_head list; + struct llist_node llist; + }; smp_call_func_t func; void *info; u16 flags; |