From: Christoph Hellwig <hch@lst.de> To: Jens Axboe <axboe@kernel.dk>, Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Geoff Levand <geoff@infradead.org>, Ilya Dryomov <idryomov@gmail.com>, Dongsheng Yang <dongsheng.yang@easystack.cn>, Mike Snitzer <snitzer@redhat.com>, "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>, Ira Weiny <ira.weiny@intel.com>, dm-devel@redhat.com, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org, linux-arch@vger.kernel.org, Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Subject: [PATCH 07/18] bvec: add memcpy_{from,to}_bvec and memzero_bvec helper Date: Tue, 15 Jun 2021 15:24:45 +0200 [thread overview] Message-ID: <20210615132456.753241-8-hch@lst.de> (raw) In-Reply-To: <20210615132456.753241-1-hch@lst.de> Add helpers to perform common memory operation on a bvec. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> --- include/linux/bvec.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index f8710af18eef..f9fa43b940ff 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -196,4 +196,37 @@ static inline void *bvec_kmap_local(struct bio_vec *bvec) return kmap_local_page(bvec->bv_page) + bvec->bv_offset; } +/** + * memcpy_from_bvec - copy data from a bvec + * @bvec: bvec to copy from + * + * Must be called on single-page bvecs only. + */ +static inline void memcpy_from_bvec(char *to, struct bio_vec *bvec) +{ + memcpy_from_page(to, bvec->bv_page, bvec->bv_offset, bvec->bv_len); +} + +/** + * memcpy_to_bvec - copy data to a bvec + * @bvec: bvec to copy to + * + * Must be called on single-page bvecs only. + */ +static inline void memcpy_to_bvec(struct bio_vec *bvec, const char *from) +{ + memcpy_to_page(bvec->bv_page, bvec->bv_offset, from, bvec->bv_len); +} + +/** + * memzero_bvec - zero all data in a bvec + * @bvec: bvec to zero + * + * Must be called on single-page bvecs only. + */ +static inline void memzero_bvec(struct bio_vec *bvec) +{ + memzero_page(bvec->bv_page, bvec->bv_offset, bvec->bv_len); +} + #endif /* __LINUX_BVEC_H */ -- 2.30.2
next prev parent reply other threads:[~2021-06-15 13:28 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-15 13:24 switch the block layer to use kmap_local_page v2 Christoph Hellwig 2021-06-15 13:24 ` [PATCH 01/18] mm: add a kunmap_local_dirty helper Christoph Hellwig 2021-06-18 3:01 ` Ira Weiny 2021-06-18 3:37 ` Herbert Xu 2021-06-18 18:12 ` Ira Weiny 2021-06-24 6:32 ` [PATCH] crypto: scatterwalk - Remove obsolete PageSlab check Herbert Xu 2021-06-15 13:24 ` [PATCH 02/18] mm: use kunmap_local_dirty in memcpy_to_page Christoph Hellwig 2021-06-15 13:24 ` [PATCH 03/18] mm: use kmap_local_page in memzero_page Christoph Hellwig 2021-06-15 13:24 ` [PATCH 04/18] MIPS: don't include <linux/genhd.h> in <asm/mach-rc32434/rb.h> Christoph Hellwig 2021-06-15 13:24 ` [PATCH 05/18] bvec: fix the include guards for bvec.h Christoph Hellwig 2021-06-15 13:24 ` [PATCH 06/18] bvec: add a bvec_kmap_local helper Christoph Hellwig 2021-06-16 16:52 ` [dm-devel] " Bart Van Assche 2021-06-15 13:24 ` Christoph Hellwig [this message] 2021-06-15 13:24 ` [PATCH 08/18] block: use memzero_page in zero_fill_bio Christoph Hellwig 2021-06-15 13:24 ` [PATCH 09/18] rbd: use memzero_bvec Christoph Hellwig 2021-06-15 13:24 ` [PATCH 10/18] dm-writecache: use bvec_kmap_local instead of bvec_kmap_irq Christoph Hellwig 2021-06-15 13:24 ` [PATCH 11/18] ps3disk: use memcpy_{from,to}_bvec Christoph Hellwig 2021-06-16 16:36 ` Geoff Levand 2021-06-15 13:24 ` [PATCH 12/18] block: remove bvec_kmap_irq and bvec_kunmap_irq Christoph Hellwig 2021-06-15 13:24 ` [PATCH 13/18] block: rewrite bio_copy_data_iter to use bvec_kmap_local and memcpy_to_bvec Christoph Hellwig 2021-06-15 13:24 ` [PATCH 14/18] block: use memcpy_to_bvec in copy_to_high_bio_irq Christoph Hellwig 2021-06-15 13:24 ` [PATCH 15/18] block: use memcpy_from_bvec in bio_copy_kern_endio_read Christoph Hellwig 2021-06-15 13:24 ` [PATCH 16/18] block: use memcpy_from_bvec in __blk_queue_bounce Christoph Hellwig 2021-06-15 13:24 ` [PATCH 17/18] block: use bvec_kmap_local in t10_pi_type1_{prepare,complete} Christoph Hellwig 2021-06-15 13:24 ` [PATCH 18/18] block: use bvec_kmap_local in bio_integrity_process Christoph Hellwig 2021-06-16 16:03 ` switch the block layer to use kmap_local_page v2 Martin K. Petersen
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