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[patch 1/9] kdump: Add KEXEC_CRASH_CONTROL_MEMORY_LIMIT



From: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>

On s390 there is a different KEXEC_CONTROL_MEMORY_LIMIT for the normal and
the kdump kexec case. Therefore this patch introduces a new macro
KEXEC_CRASH_CONTROL_MEMORY_LIMIT. This is set to
KEXEC_CONTROL_MEMORY_LIMIT for all architectures that do not define
KEXEC_CRASH_CONTROL_MEMORY_LIMIT.

Signed-off-by: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>
---
 include/linux/kexec.h |    4 ++++
 kernel/kexec.c        |    2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -33,6 +33,10 @@
 #error KEXEC_ARCH not defined
 #endif
 
+#ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT
+#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT
+#endif
+
 #define KEXEC_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
 #define KEXEC_CORE_NOTE_NAME "CORE"
 #define KEXEC_CORE_NOTE_NAME_BYTES ALIGN(sizeof(KEXEC_CORE_NOTE_NAME), 4)
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -498,7 +498,7 @@ static struct page *kimage_alloc_crash_c
 	while (hole_end <= crashk_res.end) {
 		unsigned long i;
 
-		if (hole_end > KEXEC_CONTROL_MEMORY_LIMIT)
+		if (hole_end > KEXEC_CRASH_CONTROL_MEMORY_LIMIT)
 			break;
 		if (hole_end > crashk_res.end)
 			break;

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