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- stretch 4.9.168-1
| __BREAD_GFP(9) | The Linux VFS | __BREAD_GFP(9) |
NAME¶
__bread_gfp - reads a specified block and returns the bhSYNOPSIS¶
struct buffer_head * __bread_gfp(struct block_device * bdev, sector_t block, unsigned size, gfp_t gfp);
ARGUMENTS¶
bdevthe block_device to read from
block
number of block
size
size (in bytes) to read
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¶
| April 2019 | Kernel Hackers Manual 4.9. |