table of contents
other versions
| __BREAD_GFP(9) | The Linux VFS | __BREAD_GFP(9) |
NAME¶
__bread_gfp - reads a specified block and returns the bh
SYNOPSIS¶
struct buffer_head * __bread_gfp(struct block_device * bdev, sector_t block, unsigned size, gfp_t gfp);
ARGUMENTS¶
struct block_device * bdev
the block_device to read from
sector_t block
number of block
unsigned size
size (in bytes) to read
gfp_t gfp
page allocation flag
DESCRIPTION¶
Reads a specified block, and returns buffer head that contains it. The page cache can be allocated from non-movable area not to prevent page migration if you set gfp to zero. It returns NULL if the block was unreadable.
COPYRIGHT¶
| June 2017 | Kernel Hackers Manual 4.11 |