coredump: introduce cn_vprintf()
Turn cn_printf(...) into cn_vprintf(va_list args), reintroduce
cn_printf() as a trivial wrapper.
This simplifies the next change and cn_vprintf() will have more
callers.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Colin Walters <walters@verbum.org>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Lennart Poettering <mzxreary@0pointer.de>
Cc: Lucas De Marchi <lucas.de.marchi@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/coredump.c b/fs/coredump.c
index 11bc368..c10a43a 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -69,17 +69,13 @@
return 0;
}
-static int cn_printf(struct core_name *cn, const char *fmt, ...)
+static int cn_vprintf(struct core_name *cn, const char *fmt, va_list arg)
{
char *cur;
int need;
int ret;
- va_list arg;
- va_start(arg, fmt);
need = vsnprintf(NULL, 0, fmt, arg);
- va_end(arg);
-
if (likely(need < cn->size - cn->used - 1))
goto out_printf;
@@ -89,9 +85,7 @@
out_printf:
cur = cn->corename + cn->used;
- va_start(arg, fmt);
vsnprintf(cur, need + 1, fmt, arg);
- va_end(arg);
cn->used += need;
return 0;
@@ -99,6 +93,18 @@
return ret;
}
+static int cn_printf(struct core_name *cn, const char *fmt, ...)
+{
+ va_list arg;
+ int ret;
+
+ va_start(arg, fmt);
+ ret = cn_vprintf(cn, fmt, arg);
+ va_end(arg);
+
+ return ret;
+}
+
static void cn_escape(char *str)
{
for (; *str; str++)