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-rw-r--r--arch/sh/kernel/setup.c29
-rw-r--r--arch/x86/kernel/setup_64.c36
2 files changed, 39 insertions, 26 deletions
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index af10db90a55..18a5baf2cba 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -140,19 +140,26 @@ static void __init reserve_crashkernel(void)
ret = parse_crashkernel(boot_command_line, free_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size) {
- if (crash_base > 0) {
- 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)(free_mem >> 20));
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- reserve_bootmem(crash_base, crash_size,
- BOOTMEM_DEFAULT);
- } else
+ if (crash_base <= 0) {
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
+ return;
+ }
+
+ if (reserve_bootmem(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)(free_mem >> 20));
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
}
}
#else
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 8345c3b12f0..a49f5f734a5 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -220,29 +220,35 @@ static inline void copy_edd(void)
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
- unsigned long long free_mem;
+ unsigned long long total_mem;
unsigned long long crash_size, crash_base;
int ret;
- free_mem =
- ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
+ total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
- ret = parse_crashkernel(boot_command_line, free_mem,
+ ret = parse_crashkernel(boot_command_line, total_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size) {
- if (crash_base > 0) {
- 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)(free_mem >> 20));
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- reserve_bootmem(crash_base, crash_size,
- BOOTMEM_DEFAULT);
- } else
+ if (crash_base <= 0) {
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
+ return;
+ }
+
+ if (reserve_bootmem(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;
}
}
#else