3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Russell King <rmk+ker...@arm.linux.org.uk>
commit 823a19cd3b91b0729d7417f1848413846be61712 upstream.
If init_mm.brk is not section aligned, the LPAE fixup code will miss
updating the final PMD. Fix this by aligning map_end.
Fixes: a77e0c7b2774 ("ARM: mm: Recreate kernel mappings in early_paging_init()")
Signed-off-by: Russell King <rmk+ker...@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/arm/mm/mmu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1436,8 +1436,8 @@ void __init early_paging_init(const stru
return;
/* remap kernel code and data */
- map_start = init_mm.start_code;
- map_end = init_mm.brk;
+ map_start = init_mm.start_code & PMD_MASK;
+ map_end = ALIGN(init_mm.brk, PMD_SIZE);
/* get a handle on things... */
pgd0 = pgd_offset_k(0);
@@ -1472,7 +1472,7 @@ void __init early_paging_init(const stru
}
/* remap pmds for kernel mapping */
- phys = __pa(map_start) & PMD_MASK;
+ phys = __pa(map_start);
do {
*pmdk++ = __pmd(phys | pmdprot);
phys += PMD_SIZE;
--
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