Patchwork [1/2] MIPS: KDUMP: skip walking indirection page for crashkernels

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Submitter Prem Mallappa
Date 2013-08-30 10:08:10
Message ID <1377857111-15493-1-git-send-email-pmallappa@caviumnetworks.com>
Download mbox | patch
Permalink /patch/5786/
State Accepted
Delegated to: Ralf Baechle
Headers show

Comments

Prem Mallappa - 2013-08-30 10:08:10
KDUMP: skip indirection page, as crashkernel has already copied to destination

Signed-off-by: Prem Mallappa <pmallappa@caviumnetworks.com>
---
 arch/mips/kernel/relocate_kernel.S | 5 +++++
 1 file changed, 5 insertions(+)

Patch

diff --git a/arch/mips/kernel/relocate_kernel.S b/arch/mips/kernel/relocate_kernel.S
index 43d2d78..2778a41 100644
--- a/arch/mips/kernel/relocate_kernel.S
+++ b/arch/mips/kernel/relocate_kernel.S
@@ -26,6 +26,11 @@  process_entry:
 	PTR_L		s2, (s0)
 	PTR_ADD		s0, s0, SZREG
 
+	/* In case of kdump/crash kernel, indirection page is not populated
+	* as the kernel is directly copied to reserved location
+	*/
+	beq             s2, zero, done
+
 	/* destination page */
 	and		s3, s2, 0x1
 	beq		s3, zero, 1f