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CentOS 7.0 - man page for cacheflush (centos section 2)

CACHEFLUSH(2)				      Linux Programmer's Manual 				CACHEFLUSH(2)

NAME
cacheflush - flush contents of instruction and/or data cache
SYNOPSIS
#include <asm/cachectl.h> int cacheflush(char *addr, int nbytes, int cache);
DESCRIPTION
cacheflush() flushes the contents of the indicated cache(s) for the user addresses in the range addr to (addr+nbytes-1). cache may be one of: ICACHE Flush the instruction cache. DCACHE Write back to memory and invalidate the affected valid cache lines. BCACHE Same as (ICACHE|DCACHE).
RETURN VALUE
cacheflush() returns 0 on success or -1 on error. If errors are detected, errno will indicate the error.
ERRORS
EFAULT Some or all of the address range addr to (addr+nbytes-1) is not accessible. EINVAL cache is not one of ICACHE, DCACHE, or BCACHE.
CONFORMING TO
This Linux-specific system call is available only on MIPS-based systems. It should not be used in programs intended to be portable.
BUGS
The current implementation ignores the addr and nbytes arguments. Therefore, the whole cache is always flushed.
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and informa- tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2007-05-26 CACHEFLUSH(2)


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