[PATCH 05/11] coredump: deduplicate the to_skip flush

[Christian Brauner <brauner@kernel.org>]

dump_emit() and dump_emit_page() open-code the same flush of the
accumulated cprm->to_skip. Move it into a helper.

No functional change.

Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
 fs/coredump.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/fs/coredump.c b/fs/coredump.c
index e5463e3b3f4b..6de18bc49925 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -1249,13 +1249,21 @@ static int __dump_skip(struct coredump_params *cprm, size_t nr)
 	return __dump_emit(cprm, zeroes, nr);
 }
 
-int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
+/* Flush the accumulated hole before writing data. */
+static int dump_flush(struct coredump_params *cprm)
 {
 	if (cprm->to_skip) {
 		if (!__dump_skip(cprm, cprm->to_skip))
 			return 0;
 		cprm->to_skip = 0;
 	}
+	return 1;
+}
+
+int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
+{
+	if (!dump_flush(cprm))
+		return 0;
 	return __dump_emit(cprm, addr, nr);
 }
 EXPORT_SYMBOL(dump_emit);
@@ -1284,11 +1292,8 @@ static int dump_emit_page(struct coredump_params *cprm, struct page *page)
 	if (!page)
 		return 0;
 
-	if (cprm->to_skip) {
-		if (!__dump_skip(cprm, cprm->to_skip))
-			return 0;
-		cprm->to_skip = 0;
-	}
+	if (!dump_flush(cprm))
+		return 0;
 	if (cprm->written + PAGE_SIZE > cprm->limit)
 		return 0;
 	if (dump_interrupted())

-- 
2.53.0