bdev_read_page — Start reading a page from a block device
int bdev_read_page ( | struct block_device * bdev, |
| sector_t sector, | |
struct page * page); |
bdevThe device to read the page from
sectorThe offset on the device to read the page to (need not be aligned)
pageThe page to read
On entry, the page should be locked. It will be unlocked when the page has been read. If the block driver implements rw_page synchronously, that will be true on exit from this function, but it need not be.
Errors returned by this function are usually “soft”, eg out of memory, or queue full; callers should try a different route to read this page rather than propagate an error back up the stack.