From 3f2d4f561fab4588344cc519fd323382ab950928 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Tue, 13 Apr 2010 07:01:46 +0100 Subject: 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 Signed-off-by: Russell King --- arch/arm/mm/mmu.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 4223d086aa17..241c24a1c18f 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()) -- cgit v1.2.3-59-g8ed1b