linux-kernel - [PATCH 23/58] mm: Avoid defining set_iounmap

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Date:	Sun, 18 Nov 2012 21:28:02 -0800
From:	Josh Triplett <josh@...htriplett.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Minchan Kim <minchan@...nel.org>,
	Kautuk Consul <consul.kautuk@...il.com>,
	Cong Wang <amwang@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Cc:	Josh Triplett <josh@...htriplett.org>
Subject: [PATCH 23/58] mm: Avoid defining set_iounmap_nonlazy on non-x86

Commit 3ee48b6af49cf534ca2f481ecc484b156a41451d added the
set_iounmap_nonlazy function for use on x86, but actually defined it on
all architectures.  Only x86 prototypes this function (in asm/io.h), and
only x86 uses it (in arch/x86/kernel/crash_dump_64.c), so avoid defining
it on non-x86.

Meanwhile, include the appropriate header with the prototype, to
eliminate a warning from gcc (-Wmissing-prototypes) and from Sparse
(-Wdecl).

mm/vmalloc.c:563:6: warning: no previous prototype for ‘set_iounmap_nonlazy’ [-Wmissing-prototypes]

Signed-off-by: Josh Triplett <josh@...htriplett.org>
---
 mm/vmalloc.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 78e0830..fc32a0a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -27,6 +27,7 @@
 #include <linux/pfn.h>
 #include <linux/kmemleak.h>
 #include <linux/atomic.h>
+#include <linux/io.h>
 #include <asm/uaccess.h>
 #include <asm/tlbflush.h>
 #include <asm/shmparam.h>
@@ -556,6 +557,7 @@ static atomic_t vmap_lazy_nr = ATOMIC_INIT(0);
 /* for per-CPU blocks */
 static void purge_fragmented_blocks_allcpus(void);
 
+#ifdef CONFIG_X86
 /*
  * called before a call to iounmap() if the caller wants vm_area_struct's
  * immediately freed.
@@ -564,6 +566,7 @@ void set_iounmap_nonlazy(void)
 {
 	atomic_set(&vmap_lazy_nr, lazy_max_pages()+1);
 }
+#endif
 
 /*
  * Purges all lazily-freed vmap areas.
-- 
1.7.10.4

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