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author | Akinobu Mita <akinobu.mita@gmail.com> | 2014-10-09 15:26:53 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 22:25:53 -0400 |
commit | 59d43914ed7b96255271ad6b7b735344beffa3c0 (patch) | |
tree | 83497d5e1b25c77fc222d5845b584c258857fde5 /drivers/power | |
parent | 21bb9bd19430a43e6462ce75030fd7fac4b766ef (diff) |
vfs: make guard_bh_eod() more generic
This patchset implements readpages() operation for block device by using
mpage_readpages() which can create multipage BIOs instead of BIOs for each
page and reduce system CPU time consumption.
This patch (of 3):
guard_bh_eod() is used in submit_bh() to allow us to do IO even on the odd
last sectors of a device, even if the block size is some multiple of the
physical sector size. This makes guard_bh_eod() more generic and renames
it guard_bio_eod() so that we can use it without struct buffer_head
argument.
The reason for this change is that using mpage_readpages() for block
device requires to add this guard check in mpage code.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/power')
0 files changed, 0 insertions, 0 deletions