linux-kernel - [PATCH] mm: Fix section mismatch in memory

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Date:	Mon, 16 Nov 2009 08:06:32 +0600
From:	Rakib Mullick <rakib.mullick@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: [PATCH] mm: Fix section mismatch in memory_hotplug.c

 __free_pages_bootmem() is a __meminit function - which has been called
from put_pages_bootmem thus causes a section mismatch warning.

 We were warned by the following warning:

  LD      mm/built-in.o
WARNING: mm/built-in.o(.text+0x26b22): Section mismatch in reference
from the function put_page_bootmem() to the function
.meminit.text:__free_pages_bootmem()
The function put_page_bootmem() references
the function __meminit __free_pages_bootmem().
This is often because put_page_bootmem lacks a __meminit
annotation or the annotation of __free_pages_bootmem is wrong.

Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
---

--- linus/mm/memory_hotplug.c	2009-11-13 13:17:06.000000000 +0600
+++ rakib/mm/memory_hotplug.c	2009-11-15 08:30:31.000000000 +0600
@@ -70,7 +70,9 @@ static void get_page_bootmem(unsigned lo
 	atomic_inc(&page->_count);
 }

-void put_page_bootmem(struct page *page)
+/* reference to __meminit __free_pages_bootmem is valid
+ * so use __ref to tell modpost not to generate a warning */
+void __ref put_page_bootmem(struct page *page)
 {
 	int type;
--
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