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.TH "__FFS" 9 "August 2005" "Kernel Hackers Manual" "LINUX"
.SH NAME
__ffs \- find first bit in word.
.SH "SYNOPSIS"
.ad l
.hy 0
.HP 24
unsigned\ long\ \fB__ffs\ \fR\ (unsigned\ long\ \fIword\fR);
.ad
.hy

.SH "ARGUMENTS"

.TP
\fIword\fR
The word to search

.SH "DESCRIPTION"

.PP
Undefined if no bit exists, so code should check against 0 first\&.