From 0c45355fc7c48c82db151bf0e7ca305d513e639e Mon Sep 17 00:00:00 2001
From: Benjamin LaHaise <bcrl@kvack.org>
Date: Wed, 17 Jul 2013 09:34:24 -0400
Subject: [PATCH] aio: fix build when migration is disabled
When "fs/aio: Add support to aio ring pages migration" was applied, it
broke the build when CONFIG_MIGRATION was disabled. Wrap the migration
code with a test for CONFIG_MIGRATION to fix this and save a few bytes
when migration is disabled.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
---
fs/aio.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/aio.c b/fs/aio.c
index cbd0afe77273..dedeea01e4e4 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -181,6 +181,7 @@ static int aio_set_page_dirty(struct page *page)
return 0;
}
+#if IS_ENABLED(CONFIG_MIGRATION)
static int aio_migratepage(struct address_space *mapping, struct page *new,
struct page *old, enum migrate_mode mode)
{
@@ -208,10 +209,13 @@ static int aio_migratepage(struct address_space *mapping, struct page *new,
return rc;
}
+#endif
static const struct address_space_operations aio_ctx_aops = {
.set_page_dirty = aio_set_page_dirty,
+#if IS_ENABLED(CONFIG_MIGRATION)
.migratepage = aio_migratepage,
+#endif
};
static int aio_setup_ring(struct kioctx *ctx)