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authorBernhard Walle <bwalle@suse.de>2007-10-21 16:42:01 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-22 08:13:19 -0700
commit00bf4098beb15ca174b54f3af1f1e1908d7d18a3 (patch)
tree611bacb1f855c86e8b6b210bffabfc3ab481b60e /arch/ia64/kernel/setup.c
parentc03ab37cbe1db0ec9186d8de04dd3801c0af0fba (diff)
downloadblackbird-op-linux-00bf4098beb15ca174b54f3af1f1e1908d7d18a3.tar.gz
blackbird-op-linux-00bf4098beb15ca174b54f3af1f1e1908d7d18a3.zip
kexec: add BSS to resource tree
Add the BSS to the resource tree just as kernel text and kernel data are in the resource tree. The main reason behind this is to avoid crashkernel reservation in that area. While it's not strictly necessary to have the BSS in the resource tree (the actual collision detection is done in the reserve_bootmem() function before), the usage of the BSS resource should be presented to the user in /proc/iomem just as Kernel data and Kernel code. Note: The patch currently is only implemented for x86 and ia64 (because efi_initialize_iomem_resources() has the same signature on i386 and ia64). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: <linux-arch@vger.kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64/kernel/setup.c')
-rw-r--r--arch/ia64/kernel/setup.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index cbf67f1aa291..ae6c3c02e117 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -90,7 +90,12 @@ static struct resource code_resource = {
.name = "Kernel code",
.flags = IORESOURCE_BUSY | IORESOURCE_MEM
};
-extern char _text[], _end[], _etext[];
+
+static struct resource bss_resource = {
+ .name = "Kernel bss",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+extern char _text[], _end[], _etext[], _edata[], _bss[];
unsigned long ia64_max_cacheline_size;
@@ -200,8 +205,11 @@ static int __init register_memory(void)
code_resource.start = ia64_tpa(_text);
code_resource.end = ia64_tpa(_etext) - 1;
data_resource.start = ia64_tpa(_etext);
- data_resource.end = ia64_tpa(_end) - 1;
- efi_initialize_iomem_resources(&code_resource, &data_resource);
+ data_resource.end = ia64_tpa(_edata) - 1;
+ bss_resource.start = ia64_tpa(_bss);
+ bss_resource.end = ia64_tpa(_end) - 1;
+ efi_initialize_iomem_resources(&code_resource, &data_resource,
+ &bss_resource);
return 0;
}
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