bdev_read_page (9) - Linux Manuals
bdev_read_page: Start reading a page from a block device
NAME
bdev_read_page - Start reading a page from a block device
SYNOPSIS
-
int bdev_read_page(struct block_device
* bdev, sector_tsector, struct page * page);
ARGUMENTS
bdev
-
- The device to read the page from
sector
- The offset on the device to read the page to (need not be aligned)
page
- The page to read
DESCRIPTION
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.
RETURN
negative errno if an error occurs, 0 if submission was successful.
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