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| author | Eric Blake <eblake@redhat.com> | 2017-07-07 07:44:48 -0500 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-07-10 13:18:06 +0200 |
| commit | 931e52607fbecb40543b298d7ee8740d0e4af3ef (patch) | |
| tree | 0ccf6043402e0a5510a14e1fd3ebad8b4441790e | |
| parent | e6f2419389a841260e0323ae72751ab489ec6dcc (diff) | |
| download | qemu-931e52607fbecb40543b298d7ee8740d0e4af3ef.zip qemu-931e52607fbecb40543b298d7ee8740d0e4af3ef.tar.gz qemu-931e52607fbecb40543b298d7ee8740d0e4af3ef.tar.bz2 | |
mirror: Update signature of mirror_clip_sectors()
Rather than having a void function that modifies its input
in-place as the output, change the signature to reduce a layer
of indirection and return the result.
Suggested-by: John Snow <jsnow@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/mirror.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/block/mirror.c b/block/mirror.c index 60eefbd..a41ef25 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -176,12 +176,12 @@ static void mirror_read_complete(void *opaque, int ret) aio_context_release(blk_get_aio_context(s->common.blk)); } -static inline void mirror_clip_sectors(MirrorBlockJob *s, - int64_t sector_num, - int *nb_sectors) +static inline int mirror_clip_sectors(MirrorBlockJob *s, + int64_t sector_num, + int nb_sectors) { - *nb_sectors = MIN(*nb_sectors, - s->bdev_length / BDRV_SECTOR_SIZE - sector_num); + return MIN(nb_sectors, + s->bdev_length / BDRV_SECTOR_SIZE - sector_num); } /* Round sector_num and/or nb_sectors to target cluster if COW is needed, and @@ -216,7 +216,8 @@ static int mirror_cow_align(MirrorBlockJob *s, } /* Clipping may result in align_nb_sectors unaligned to chunk boundary, but * that doesn't matter because it's already the end of source image. */ - mirror_clip_sectors(s, align_sector_num, &align_nb_sectors); + align_nb_sectors = mirror_clip_sectors(s, align_sector_num, + align_nb_sectors); ret = align_sector_num + align_nb_sectors - (*sector_num + *nb_sectors); *sector_num = align_sector_num; @@ -445,7 +446,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s) return 0; } - mirror_clip_sectors(s, sector_num, &io_sectors); + io_sectors = mirror_clip_sectors(s, sector_num, io_sectors); switch (mirror_method) { case MIRROR_METHOD_COPY: io_sectors = mirror_do_read(s, sector_num, io_sectors); |