From 00bf4098beb15ca174b54f3af1f1e1908d7d18a3 Mon Sep 17 00:00:00 2001 From: Bernhard Walle Date: Sun, 21 Oct 2007 16:42:01 -0700 Subject: 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 Cc: "Eric W. Biederman" Cc: Vivek Goyal Cc: Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/kernel/setup_32.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/x86/kernel/setup_32.c') diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c index ba2e165a8a0..cc0e91447b7 100644 --- a/arch/x86/kernel/setup_32.c +++ b/arch/x86/kernel/setup_32.c @@ -60,6 +60,7 @@ #include #include #include +#include /* This value is set up by the early boot code to point to the value immediately after the boot time page tables. It contains a *physical* @@ -73,6 +74,7 @@ int disable_pse __devinitdata = 0; */ extern struct resource code_resource; extern struct resource data_resource; +extern struct resource bss_resource; /* cpu data as detected by the assembly code in head.S */ struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; @@ -600,6 +602,8 @@ void __init setup_arch(char **cmdline_p) code_resource.end = virt_to_phys(_etext)-1; data_resource.start = virt_to_phys(_etext); data_resource.end = virt_to_phys(_edata)-1; + bss_resource.start = virt_to_phys(&__bss_start); + bss_resource.end = virt_to_phys(&__bss_stop)-1; parse_early_param(); -- cgit v1.2.3