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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-03-19 21:15:46 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-03-19 21:15:46 +0100 |
| commit | 566b60c04ab230b8cc3845f964306f99504b18df (patch) | |
| tree | 1897a526488c3496f4ffe5eebb39a1dd41ab731d /drivers/md/dm-io.c | |
| parent | Merge branch 'for-rmk/perf' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff) | |
| parent | ARM: add uprobes support (diff) | |
| download | linux-566b60c04ab230b8cc3845f964306f99504b18df.tar.xz linux-566b60c04ab230b8cc3845f964306f99504b18df.zip | |
Merge branch 'uprobes-v7' of git://git.linaro.org/people/dave.long/linux into devel-stable
This patch series adds basic uprobes support to ARM. It is based on
patches developed earlier by Rabin Vincent. That approach of adding
hooks into the kprobes instruction parsing code was not well received.
This approach separates the ARM instruction parsing code in kprobes out
into a separate set of functions which can be used by both kprobes and
uprobes. Both kprobes and uprobes then provide their own semantic action
tables to process the results of the parsing.
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index b2b8a10e8427..3842ac738f98 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -201,29 +201,28 @@ static void list_dp_init(struct dpages *dp, struct page_list *pl, unsigned offse /* * Functions for getting the pages from a bvec. */ -static void bio_get_page(struct dpages *dp, - struct page **p, unsigned long *len, unsigned *offset) +static void bio_get_page(struct dpages *dp, struct page **p, + unsigned long *len, unsigned *offset) { - struct bio *bio = dp->context_ptr; - struct bio_vec bvec = bio_iovec(bio); - *p = bvec.bv_page; - *len = bvec.bv_len; - *offset = bvec.bv_offset; + struct bio_vec *bvec = dp->context_ptr; + *p = bvec->bv_page; + *len = bvec->bv_len - dp->context_u; + *offset = bvec->bv_offset + dp->context_u; } static void bio_next_page(struct dpages *dp) { - struct bio *bio = dp->context_ptr; - struct bio_vec bvec = bio_iovec(bio); - - bio_advance(bio, bvec.bv_len); + struct bio_vec *bvec = dp->context_ptr; + dp->context_ptr = bvec + 1; + dp->context_u = 0; } static void bio_dp_init(struct dpages *dp, struct bio *bio) { dp->get_page = bio_get_page; dp->next_page = bio_next_page; - dp->context_ptr = bio; + dp->context_ptr = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter); + dp->context_u = bio->bi_iter.bi_bvec_done; } /* |