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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-11-28 21:43:40 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-11-30 14:45:31 +0000
commitd8aa712c30148ba26fd89a5dc14de95d4c375184 (patch)
tree61f15d12929d3dd19dbf0589035777cb2751a476 /arch/arm/mm
parent11a5aa32562e1e90ab2d0278748fe0fbecda1cbe (diff)
ARM: fix booting low-vectors machines
Commit f6f91b0d9fd9 (ARM: allow kuser helpers to be removed from the vector page) required two pages for the vectors code. Although the code setting up the initial page tables was updated, the code which allocates page tables for new processes wasn't, neither was the code which tears down the mappings. Fix this. Fixes: f6f91b0d9fd9 ("ARM: allow kuser helpers to be removed from the vector page") Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: <stable@vger.kernel.org>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/mmap.c2
-rw-r--r--arch/arm/mm/pgd.c3
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index d27158c38eb..5e85ed37136 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -146,7 +146,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
info.flags = VM_UNMAPPED_AREA_TOPDOWN;
info.length = len;
- info.low_limit = PAGE_SIZE;
+ info.low_limit = FIRST_USER_ADDRESS;
info.high_limit = mm->mmap_base;
info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
info.align_offset = pgoff << PAGE_SHIFT;
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index 0acb089d0f7..1046b373d1a 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -87,7 +87,8 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
init_pud = pud_offset(init_pgd, 0);
init_pmd = pmd_offset(init_pud, 0);
init_pte = pte_offset_map(init_pmd, 0);
- set_pte_ext(new_pte, *init_pte, 0);
+ set_pte_ext(new_pte + 0, init_pte[0], 0);
+ set_pte_ext(new_pte + 1, init_pte[1], 0);
pte_unmap(init_pte);
pte_unmap(new_pte);
}