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Subject[PATCH] Unify crashkernel reservation for 32 and 64 bit
Date
This patch moves the reserve_crashkernel() to setup.c and removes the
architecture-specific version. Both versions were more or less the same.


Signed-off-by: Bernhard Walle <bwalle@suse.de>
---
arch/x86/kernel/setup.c | 61 ++++++++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/setup_32.c | 53 --------------------------------------
arch/x86/kernel/setup_64.c | 40 ----------------------------
include/asm-x86/setup.h | 3 ++
4 files changed, 64 insertions(+), 93 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 542ff3c..915aa13 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -3,6 +3,7 @@
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/percpu.h>
+#include <linux/kexec.h>
#include <asm/smp.h>
#include <asm/percpu.h>
#include <asm/sections.h>
@@ -11,6 +12,7 @@
#include <asm/topology.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
+#include <asm/highmem.h>

#ifdef CONFIG_X86_LOCAL_APIC
unsigned int num_processors;
@@ -404,3 +406,62 @@ EXPORT_SYMBOL(node_to_cpumask);
#endif /* CONFIG_DEBUG_PER_CPU_MAPS */

#endif /* X86_64_NUMA */
+
+
+/*
+ * --------- Crashkernel reservation ------------------------------
+ */
+
+static inline unsigned long long get_total_mem(void)
+{
+ unsigned long long total;
+
+ total = max_low_pfn - min_low_pfn;
+#ifdef CONFIG_HIGHMEM
+ total += highend_pfn - highstart_pfn;
+#endif
+
+ return total << PAGE_SHIFT;
+}
+
+#ifdef CONFIG_KEXEC
+void __init reserve_crashkernel(void)
+{
+ unsigned long long total_mem;
+ unsigned long long crash_size, crash_base;
+ int ret;
+
+ total_mem = get_total_mem();
+
+ ret = parse_crashkernel(boot_command_line, total_mem,
+ &crash_size, &crash_base);
+ if (ret == 0 && crash_size > 0) {
+ if (crash_base <= 0) {
+ printk(KERN_INFO "crashkernel reservation failed - "
+ "you have to specify a base address\n");
+ return;
+ }
+
+ if (reserve_bootmem_generic(crash_base, crash_size,
+ BOOTMEM_EXCLUSIVE) < 0) {
+ printk(KERN_INFO "crashkernel reservation failed - "
+ "memory is in use\n");
+ return;
+ }
+
+ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
+ "for crashkernel (System RAM: %ldMB)\n",
+ (unsigned long)(crash_size >> 20),
+ (unsigned long)(crash_base >> 20),
+ (unsigned long)(total_mem >> 20));
+
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
+ insert_resource(&iomem_resource, &crashk_res);
+ }
+}
+#else
+void __init reserve_crashkernel(void)
+{}
+#endif
+
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 348dc8a..a00b71b 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -429,59 +429,6 @@ extern unsigned long __init setup_memory(void);
extern void zone_sizes_init(void);
#endif /* !CONFIG_NEED_MULTIPLE_NODES */

-static inline unsigned long long get_total_mem(void)
-{
- unsigned long long total;
-
- total = max_low_pfn - min_low_pfn;
-#ifdef CONFIG_HIGHMEM
- total += highend_pfn - highstart_pfn;
-#endif
-
- return total << PAGE_SHIFT;
-}
-
-#ifdef CONFIG_KEXEC
-static void __init reserve_crashkernel(void)
-{
- unsigned long long total_mem;
- unsigned long long crash_size, crash_base;
- int ret;
-
- total_mem = get_total_mem();
-
- ret = parse_crashkernel(boot_command_line, total_mem,
- &crash_size, &crash_base);
- if (ret == 0 && crash_size > 0) {
- if (crash_base <= 0) {
- printk(KERN_INFO "crashkernel reservation failed - "
- "you have to specify a base address\n");
- return;
- }
-
- if (reserve_bootmem_generic(crash_base, crash_size,
- BOOTMEM_EXCLUSIVE) < 0) {
- printk(KERN_INFO "crashkernel reservation failed - "
- "memory is in use\n");
- return;
- }
-
- printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
- "for crashkernel (System RAM: %ldMB)\n",
- (unsigned long)(crash_size >> 20),
- (unsigned long)(crash_base >> 20),
- (unsigned long)(total_mem >> 20));
-
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- insert_resource(&iomem_resource, &crashk_res);
- }
-}
-#else
-static inline void __init reserve_crashkernel(void)
-{}
-#endif
-
#ifdef CONFIG_BLK_DEV_INITRD

static bool do_relocate_initrd = false;
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 6ad0fe4..076d61b 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -244,46 +244,6 @@ static inline void copy_edd(void)
}
#endif

-#ifdef CONFIG_KEXEC
-static void __init reserve_crashkernel(void)
-{
- unsigned long long total_mem;
- unsigned long long crash_size, crash_base;
- int ret;
-
- total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
-
- ret = parse_crashkernel(boot_command_line, total_mem,
- &crash_size, &crash_base);
- if (ret == 0 && crash_size) {
- if (crash_base <= 0) {
- printk(KERN_INFO "crashkernel reservation failed - "
- "you have to specify a base address\n");
- return;
- }
-
- if (reserve_bootmem_generic(crash_base, crash_size,
- BOOTMEM_EXCLUSIVE) < 0) {
- printk(KERN_INFO "crashkernel reservation failed - "
- "memory is in use\n");
- return;
- }
-
- printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
- "for crashkernel (System RAM: %ldMB)\n",
- (unsigned long)(crash_size >> 20),
- (unsigned long)(crash_base >> 20),
- (unsigned long)(total_mem >> 20));
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- insert_resource(&iomem_resource, &crashk_res);
- }
-}
-#else
-static inline void __init reserve_crashkernel(void)
-{}
-#endif
-
/* Current gdt points %fs at the "master" per-cpu area: after this,
* it's on the real one. */
void switch_to_new_gdt(void)
diff --git a/include/asm-x86/setup.h b/include/asm-x86/setup.h
index e14b6e7..b434bdd 100644
--- a/include/asm-x86/setup.h
+++ b/include/asm-x86/setup.h
@@ -8,6 +8,9 @@
/* Interrupt control for vSMPowered x86_64 systems */
void vsmp_init(void);

+/* Crashkernel reservation */
+void reserve_crashkernel(void);
+
#ifndef CONFIG_PARAVIRT
#define paravirt_post_allocator_init() do {} while (0)
#endif
--
1.5.4.5


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