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[3.13,022/187] sparc64: Fix range check in kern_addr_valid().

Message ID 1410818997-9432-23-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa Sept. 15, 2014, 10:07 p.m. UTC 
3.13.11.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "David S. Miller" <davem@davemloft.net>

[ Upstream commit ee73887e92a69ae0a5cda21c68ea75a27804c944 ]

In commit b2d438348024b75a1ee8b66b85d77f569a5dfed8 ("sparc64: Make
PAGE_OFFSET variable."), the MAX_PHYS_ADDRESS_BITS value was increased
(to 47).

This constant reference to '41UL' was missed.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/sparc/include/asm/pgtable_64.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index ac5f708..ff97960 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -916,7 +916,7 @@  static inline bool kern_addr_valid(unsigned long addr)
 {
 	unsigned long paddr = __pa(addr);
 
-	if ((paddr >> 41UL) != 0UL)
+	if ((paddr >> MAX_PHYS_ADDRESS_BITS) != 0UL)
 		return false;
 	return test_bit(paddr >> 22, sparc64_valid_addr_bitmap);
 }