__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
       bdev
           the 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
Kernel Hackers Manual 4.8.                 January 2017                            __BREAD_GFP(9)