mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 19:36:43 +07:00
d32311fed7
sg_init_one is a nice tool for the block layer. However, users of struct scatterlist in other subsystems don't usually need the DMA attributes. For them it's a waste of time and space to initialise the whole struct scatterlist structure. Therefore this patch adds a new function sg_set_buf to initialise a scatterlist without zeroing the DMA attributes. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
24 lines
520 B
C
24 lines
520 B
C
#ifndef _LINUX_SCATTERLIST_H
|
|
#define _LINUX_SCATTERLIST_H
|
|
|
|
#include <asm/scatterlist.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/string.h>
|
|
|
|
static inline void sg_set_buf(struct scatterlist *sg, void *buf,
|
|
unsigned int buflen)
|
|
{
|
|
sg->page = virt_to_page(buf);
|
|
sg->offset = offset_in_page(buf);
|
|
sg->length = buflen;
|
|
}
|
|
|
|
static inline void sg_init_one(struct scatterlist *sg, void *buf,
|
|
unsigned int buflen)
|
|
{
|
|
memset(sg, 0, sizeof(*sg));
|
|
sg_set_buf(sg, buf, buflen);
|
|
}
|
|
|
|
#endif /* _LINUX_SCATTERLIST_H */
|