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author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-01-05 08:26:50 -0800 |
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committer | Jens Axboe <axboe@kernel.dk> | 2018-01-06 09:18:00 -0700 |
commit | 14db49172649aac001fd77a3fd53d12c6df22daf (patch) | |
tree | fdfd9c997ad5e268073438a55a95269d29654fe9 /drivers/target/target_core_transport.c | |
parent | 68c6e9cd2fa4f0109364834475628b4b1dd12257 (diff) | |
download | linux-stable-14db49172649aac001fd77a3fd53d12c6df22daf.tar.gz linux-stable-14db49172649aac001fd77a3fd53d12c6df22daf.tar.bz2 linux-stable-14db49172649aac001fd77a3fd53d12c6df22daf.zip |
target: Use sgl_alloc_order() and sgl_free()
Use the sgl_alloc_order() and sgl_free() functions instead of open
coding these functions.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/target/target_core_transport.c')
-rw-r--r-- | drivers/target/target_core_transport.c | 46 |
1 files changed, 4 insertions, 42 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 58caacd54a3b..a001ba711cca 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2300,13 +2300,7 @@ queue_full: void target_free_sgl(struct scatterlist *sgl, int nents) { - struct scatterlist *sg; - int count; - - for_each_sg(sgl, sg, nents, count) - __free_page(sg_page(sg)); - - kfree(sgl); + sgl_free(sgl); } EXPORT_SYMBOL(target_free_sgl); @@ -2414,42 +2408,10 @@ int target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, bool zero_page, bool chainable) { - struct scatterlist *sg; - struct page *page; - gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; - unsigned int nalloc, nent; - int i = 0; - - nalloc = nent = DIV_ROUND_UP(length, PAGE_SIZE); - if (chainable) - nalloc++; - sg = kmalloc_array(nalloc, sizeof(struct scatterlist), GFP_KERNEL); - if (!sg) - return -ENOMEM; + gfp_t gfp = GFP_KERNEL | (zero_page ? __GFP_ZERO : 0); - sg_init_table(sg, nalloc); - - while (length) { - u32 page_len = min_t(u32, length, PAGE_SIZE); - page = alloc_page(GFP_KERNEL | zero_flag); - if (!page) - goto out; - - sg_set_page(&sg[i], page, page_len, 0); - length -= page_len; - i++; - } - *sgl = sg; - *nents = nent; - return 0; - -out: - while (i > 0) { - i--; - __free_page(sg_page(&sg[i])); - } - kfree(sg); - return -ENOMEM; + *sgl = sgl_alloc_order(length, 0, chainable, gfp, nents); + return *sgl ? 0 : -ENOMEM; } EXPORT_SYMBOL(target_alloc_sgl); |