'\" t
.\"     Title: search_bbt
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: Internal Functions Provided
.\"    Source: Kernel Hackers Manual 4.12.2
.\"  Language: English
.\"
.TH "SEARCH_BBT" "9" "July 2017" "Kernel Hackers Manual 4\&.12\&" "Internal Functions Provided"
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.SH "NAME"
search_bbt \- [GENERIC] scan the device for a specific bad block table
.SH "SYNOPSIS"
.HP \w'int\ search_bbt('u
.BI "int search_bbt(struct\ mtd_info\ *\ " "mtd" ", uint8_t\ *\ " "buf" ", struct\ nand_bbt_descr\ *\ " "td" ");"
.SH "ARGUMENTS"
.PP
\fIstruct mtd_info * mtd\fR
.RS 4
MTD device structure
.RE
.PP
\fIuint8_t * buf\fR
.RS 4
temporary buffer
.RE
.PP
\fIstruct nand_bbt_descr * td\fR
.RS 4
descriptor for the bad block table
.RE
.SH "DESCRIPTION"
.PP
Read the bad block table by searching for a given ident pattern\&. Search is preformed either from the beginning up or from the end of the device downwards\&. The search starts always at the start of a block\&. If the option NAND_BBT_PERCHIP is given, each chip is searched for a bbt, which contains the bad block information of this chip\&. This is necessary to provide support for certain DOC devices\&.
.PP
The bbt ident pattern resides in the oob area of the first page in a block\&.
.SH "AUTHOR"
.PP
\fBThomas Gleixner\fR <\&tglx@linutronix.de\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br