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authorKevin Cernekee <cernekee@gmail.com>2011-01-05 23:31:30 -0800
committerRalf Baechle <ralf@linux-mips.org>2011-07-25 17:26:54 +0100
commit464fd83e841a16f4ea1325b33eb08170ef5cd1f4 (patch)
tree2e182c5da3bf09701e048ec7edef90665feb9f44 /arch/mips/mm/pgtable-32.c
parent273f2d7e64f9fd22192b4cd31e7408284a721e69 (diff)
MIPS: Limit fixrange_init() to the FIXMAP region
fixrange_init() allocates page tables for all addresses higher than FIXADDR_TOP. On processors that override the default FIXADDR_TOP address of 0xfffe_0000, this can consume up to 4 pages (1 page per 4MB) for pgd's that are never used. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1980/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/pgtable-32.c')
-rw-r--r--arch/mips/mm/pgtable-32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/mm/pgtable-32.c b/arch/mips/mm/pgtable-32.c
index 575e4019227b..adc6911ba748 100644
--- a/arch/mips/mm/pgtable-32.c
+++ b/arch/mips/mm/pgtable-32.c
@@ -52,7 +52,7 @@ void __init pagetable_init(void)
* Fixed mappings:
*/
vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
- fixrange_init(vaddr, 0, pgd_base);
+ fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
#ifdef CONFIG_HIGHMEM
/*