x86: use BOOTMEM_EXCLUSIVE on 32-bit

This patch uses the BOOTMEM_EXCLUSIVE for crashkernel reservation also for
i386 and prints a error message on failure.

The patch is still for 2.6.26 since it is only bug fixing. The unification
of reserve_crashkernel() between i386 and x86_64 should be done for 2.6.27.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 2c5f8b213e86..5a2f8e063887 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -532,10 +532,16 @@ static void __init reserve_crashkernel(void)
                                         (unsigned long)(crash_size >> 20),
                                         (unsigned long)(crash_base >> 20),
                                         (unsigned long)(total_mem >> 20));
+
+                        if (reserve_bootmem(crash_base, crash_size,
+                                        BOOTMEM_EXCLUSIVE) < 0) {
+                                printk(KERN_INFO "crashkernel reservation "
+                                        "failed - memory is in use\n");
+                                return;
+                        }
+
                         crashk_res.start = crash_base;
                         crashk_res.end   = crash_base + crash_size - 1;
-                        reserve_bootmem(crash_base, crash_size,
-                                        BOOTMEM_DEFAULT);
                 } else
                         printk(KERN_INFO "crashkernel reservation failed - "
                                         "you have to specify a base address\n");