diff options
| author | Mika Westerberg <mika.westerberg@iki.fi> | 2010-04-13 06:01:46 (GMT) |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-04-14 10:11:31 (GMT) |
| commit | 3f2d4f561fab4588344cc519fd323382ab950928 (patch) | |
| tree | 8998ed2d054db2e446532507d9c742cfbc289502 | |
| parent | 82c6f5a5b3e91ef4d2fb8725de4b8cf7affd4d61 (diff) | |
| download | linux-3f2d4f561fab4588344cc519fd323382ab950928.tar.xz | |
ARM: 6052/1: kdump: make kexec work in interrupt context
When crash happens in interrupt context there is no userspace context.
We always use current->active_mm in those cases.
Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mm/mmu.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 4223d08..241c24a 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1054,10 +1054,12 @@ void setup_mm_for_reboot(char mode) pgd_t *pgd; int i; - if (current->mm && current->mm->pgd) - pgd = current->mm->pgd; - else - pgd = init_mm.pgd; + /* + * We need to access to user-mode page tables here. For kernel threads + * we don't have any user-mode mappings so we use the context that we + * "borrowed". + */ + pgd = current->active_mm->pgd; base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT; if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) |