Gitweb: http://git.kernel.org/linus/3f2d4f561fab4588344cc519fd323382ab950928
Commit: 3f2d4f561fab4588344cc519fd323382ab950928
Parent: 82c6f5a5b3e91ef4d2fb8725de4b8cf7affd4d61
Author: Mika Westerberg <mika.westerberg@iki.fi>
AuthorDate: Tue Apr 13 07:01:46 2010 +0100
Committer: Russell King <rmk+kernel@arm.linux.org.uk>
CommitDate: Wed Apr 14 11:11:31 2010 +0100
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>
---
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())
--
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