* [patch 51/62] x86: fix kernel_physical_mapping_init() for large x86 systems
[not found] ` <20080730234915.GA12426@suse.de>
@ 2008-07-30 23:59 ` Greg KH
0 siblings, 0 replies; only message in thread
From: Greg KH @ 2008-07-30 23:59 UTC (permalink / raw)
To: linux-kernel, stable, Oliver Pinter
Cc: Justin Forbes, Zwane Mwaikambo, Theodore Ts'o, Randy Dunlap,
Dave Jones, Chuck Wolber, Chris Wedgwood, Michael Krufky,
Chuck Ebbert, Domenico Andreoli, Willy Tarreau,
Rodrigo Rubira Branco, Jake Edge, Eugene Teo, torvalds, akpm,
alan, linux-mm, Jack Steiner, Ingo Molnar
[-- Attachment #1: x86-fix-kernel_physical_mapping_init-for-large-x86-systems.patch --]
[-- Type: text/plain, Size: 1242 bytes --]
2.6.26 -stable review patch. If anyone has any objections, please let
us know.
------------------
From: Ingo Molnar <mingo@elte.hu>
based on e22146e610bb7aed63282148740ab1d1b91e1d90 upstream
Fix bug in kernel_physical_mapping_init() that causes kernel
page table to be built incorrectly for systems with greater
than 512GB of memory.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Oliver Pinter <oliver.pntr@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
arch/x86/mm/init_64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -579,7 +579,7 @@ unsigned long __init_refok init_memory_m
else
pud = alloc_low_page(&pud_phys);
- next = start + PGDIR_SIZE;
+ next = (start + PGDIR_SIZE) & PGDIR_MASK;
if (next > end)
next = end;
last_map_addr = phys_pud_init(pud, __pa(start), __pa(next));
--
--
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