[PATCH] mm/sparse.c: mark sparse_buffer_free as __meminit

From: Arnd Bergmann <arnd@arndb.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Lecopzer Chen <lecopzer.chen@mediatek.com>,
	Mark-PK Tsai <Mark-PK.Tsai@mediatek.com>,
	Arnd Bergmann <arnd@arndb.de>, Oscar Salvador <osalvador@suse.de>,
	Michal Hocko <mhocko@suse.com>,
	Mike Rapoport <rppt@linux.ibm.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mm/sparse.c: mark sparse_buffer_free as __meminit
Date: Tue,  9 Jul 2019 20:55:07 +0200	[thread overview]
Message-ID: <20190709185528.3251709-1-arnd@arndb.de> (raw)

Calling an __init function from a __meminit function is not allowed:

WARNING: vmlinux.o(.meminit.text+0x30ff): Section mismatch in reference from the function sparse_buffer_alloc() to the function .init.text:sparse_buffer_free()
The function __meminit sparse_buffer_alloc() references
a function __init sparse_buffer_free().
If sparse_buffer_free is only used by sparse_buffer_alloc then
annotate sparse_buffer_free with a matching annotation.

Downgrade the annotation to __meminit for both, as they may be
used in the hotplug case.

Fixes: mmotm ("mm/sparse.c: fix memory leak of sparsemap_buf in aliged memory")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 mm/sparse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index 3267c4001c6d..4801d45bd66e 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -470,7 +470,7 @@ struct page __init *__populate_section_memmap(unsigned long pfn,
 static void *sparsemap_buf __meminitdata;
 static void *sparsemap_buf_end __meminitdata;
 
-static inline void __init sparse_buffer_free(unsigned long size)
+static inline void __meminit sparse_buffer_free(unsigned long size)
 {
 	WARN_ON(!sparsemap_buf || size == 0);
 	memblock_free_early(__pa(sparsemap_buf), size);
-- 
2.20.0

