linux-kernel - [PATCH] arm: it's OK to pass pointer to volatile as iounmap() argument...

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 9 Oct 2006 02:09:49 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	rmk@....linux.org.uk, linux-kernel@...r.kernel.org
Subject: [PATCH] arm: it's OK to pass pointer to volatile as iounmap() argument...

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 arch/arm/mm/ioremap.c |    6 +++---
 include/asm-arm/io.h  |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 591fc31..4654405 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -361,14 +361,14 @@ __ioremap(unsigned long phys_addr, size_
 }
 EXPORT_SYMBOL(__ioremap);
 
-void __iounmap(void __iomem *addr)
+void __iounmap(volatile void __iomem *addr)
 {
 #ifndef CONFIG_SMP
 	struct vm_struct **p, *tmp;
 #endif
 	unsigned int section_mapping = 0;
 
-	addr = (void __iomem *)(PAGE_MASK & (unsigned long)addr);
+	addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long)addr);
 
 #ifndef CONFIG_SMP
 	/*
@@ -395,6 +395,6 @@ #ifndef CONFIG_SMP
 #endif
 
 	if (!section_mapping)
-		vunmap(addr);
+		vunmap((void __force *)addr);
 }
 EXPORT_SYMBOL(__iounmap);
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index 8076a85..34aaaac 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -63,7 +63,7 @@ #define __raw_readl(a)		(__chk_io_ptr(a)
  */
 extern void __iomem * __ioremap_pfn(unsigned long, unsigned long, size_t, unsigned long);
 extern void __iomem * __ioremap(unsigned long, size_t, unsigned long);
-extern void __iounmap(void __iomem *addr);
+extern void __iounmap(volatile void __iomem *addr);
 
 /*
  * Bad read/write accesses...
-- 
1.4.2.GIT

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/