[PATCH] cacheflush.2: Update SYNOPSIS for glibc wrapper

[Alejandro Colomar <alx.manpages@xxxxxxxxx>]

Glibc uses 'void *' instead of 'char *'.
And the prototype is declared in <sys/cacheflush.h>.

......

$ syscall='cacheflush';
$ ret='int';
$ find glibc/ -type f -name '*.h' \
  |xargs pcregrep -Mn "(?s)^[\w\s]*${ret}\s*${syscall}\s*\(.*?;";
glibc/sysdeps/unix/sysv/linux/nios2/sys/cachectl.h:27:
extern int cacheflush (void *__addr, const int __nbytes, const int __op) __THROW;
glibc/sysdeps/unix/sysv/linux/mips/sys/cachectl.h:35:
extern int cacheflush (void *__addr, const int __nbytes, const int __op) __THROW;
glibc/sysdeps/unix/sysv/linux/arc/sys/cachectl.h:30:
extern int cacheflush (void *__addr, int __nbytes, int __op) __THROW;
glibc/sysdeps/unix/sysv/linux/csky/sys/cachectl.h:30:
extern int cacheflush (void *__addr, const int __nbytes,
		       const int __op) __THROW;

Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx>
---
 man2/cacheflush.2 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/man2/cacheflush.2 b/man2/cacheflush.2
index 2cf624f3a..0496879ca 100644
--- a/man2/cacheflush.2
+++ b/man2/cacheflush.2
@@ -27,9 +27,9 @@
 cacheflush \- flush contents of instruction and/or data cache
 .SH SYNOPSIS
 .nf
-.B #include <asm/cachectl.h>
+.B #inlcude <sys/cacheflush.h>
 .PP
-.BI "int cacheflush(char *" addr ", int "nbytes ", int "cache );
+.BI "int cacheflush(void *" addr ", int "nbytes ", int "cache );
 .fi
 .PP
 .IR Note :
-- 
2.30.0