[PATCH 2/6] coredump: introduce cn_vprintf()

[Oleg Nesterov]

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 <o...@redhat.com>
---
 fs/coredump.c |   20 +++++++++++++-------
 1 files changed, 13 insertions(+), 7 deletions(-)

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 @@ static int expand_corename(struct core_name *cn)
        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 @@ static int cn_printf(struct core_name *cn, const char *fmt, 
...)
 
 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 @@ expand_fail:
        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++)
-- 
1.5.5.1

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