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| author |   Christoph Hellwig <hch@lst.de> | 2024-07-06 09:52:17 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2024-07-08 01:51:05 -0600 |
| commit | 25f76c3db2f08428b5acd082a52787164001eb6e (patch) | |
| tree | 7c73e1146750721b46a0869742cff0d4b3282a86 /include/linux/bvec.h | |
| parent | blk-lib: check for kill signal in ioctl BLKZEROOUT (diff) | |
| download | wireguard-linux-25f76c3db2f08428b5acd082a52787164001eb6e.tar.xz wireguard-linux-25f76c3db2f08428b5acd082a52787164001eb6e.zip | |
block: add a bvec_phys helper
Get callers out of poking into bvec internals a bit more. Not a huge win
right now, but with the proposed new DMA mapping API we might end up with
a lot more of this otherwise.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240706075228.2350978-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/bvec.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h index bd1e361b351c..f41c7f0ef91e 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -280,4 +280,18 @@ static inline void *bvec_virt(struct bio_vec *bvec) return page_address(bvec->bv_page) + bvec->bv_offset; } +/** + * bvec_phys - return the physical address for a bvec + * @bvec: bvec to return the physical address for + */ +static inline phys_addr_t bvec_phys(const struct bio_vec *bvec) +{ + /* + * Note this open codes page_to_phys because page_to_phys is defined in + * <asm/io.h>, which we don't want to pull in here. If it ever moves to + * a sensible place we should start using it. + */ + return PFN_PHYS(page_to_pfn(bvec->bv_page)) + bvec->bv_offset; +} + #endif /* __LINUX_BVEC_H */ |