MIPS: kdump: Skip walking indirection page for crashkernels
KDUMP: skip indirection page, as crashkernel has already copied to destination
[ralf@linux-mips.org: cosmetic changes.]
Signed-off-by: Prem Mallappa <pmallappa@caviumnetworks.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/5786/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/relocate_kernel.S b/arch/mips/kernel/relocate_kernel.S
index 43d2d78..74bab9d 100644
--- a/arch/mips/kernel/relocate_kernel.S
+++ b/arch/mips/kernel/relocate_kernel.S
@@ -26,6 +26,12 @@
PTR_L s2, (s0)
PTR_ADD s0, s0, SZREG
+ /*
+ * In case of a kdump/crash kernel, the indirection page is not
+ * populated as the kernel is directly copied to a reserved location
+ */
+ beqz s2, done
+
/* destination page */
and s3, s2, 0x1
beq s3, zero, 1f