.TH "submit_bh" 9 "submit_bh" "25 May 1998" "Kernel Hacker's Manual" LINUX
.SH NAME
submit_bh \- 
.SH SYNOPSIS
.B "void" submit_bh
.BI "(int " rw ","
.BI "struct buffer_head *" bh ");"
.SH ARGUMENTS
.IP "rw" 12
 whether to READ or WRITE, or maybe to READA (read ahead)
.IP "bh" 12
 The \fBstruct\fP buffer_head which describes the I/O
.SH "DESCRIPTION"
\fBsubmit_bh\fP is very similar in purpose to \fBgeneric_make_request\fP, and
uses that function to do most of the work.

The extra functionality provided by submit_bh is to determine
b_rsector from b_blocknr and b_size, and to set b_rdev from b_dev.
This is is appropriate for IO requests that come from the buffer
cache and page cache which (currently) always use aligned blocks.