diff options
| author | Huang Ying <ying.huang@intel.com> | 2008-10-31 04:48:08 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-31 12:01:56 +0300 |
| commit | 92be3d6bdf2cb34972ab50e12ad4da1076e690da (patch) | |
| tree | 6ed10cb8a14615ca0bda48f64520c82480397d00 /arch/x86/include/asm/kexec.h | |
| parent | 31498a01496ffca3b542bae72b8ec499cd9302db (diff) | |
| download | linux-92be3d6bdf2cb34972ab50e12ad4da1076e690da.tar.xz | |
kexec/i386: allocate page table pages dynamically
Impact: save .text size when kexec is built in but not loaded
This patch adds an architecture specific struct kimage_arch into
struct kimage. The pointers to page table pages used by kexec are
added to struct kimage_arch. The page tables pages are dynamically
allocated in machine_kexec_prepare instead of statically from BSS
segment. This will save up to 20k memory when kexec image is not
loaded.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/kexec.h')
| -rw-r--r-- | arch/x86/include/asm/kexec.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h index a1f22771a15a..df9c41a9c6ae 100644 --- a/arch/x86/include/asm/kexec.h +++ b/arch/x86/include/asm/kexec.h @@ -170,6 +170,20 @@ relocate_kernel(unsigned long indirection_page, unsigned long start_address) ATTRIB_NORET; #endif +#ifdef CONFIG_X86_32 +#define ARCH_HAS_KIMAGE_ARCH + +struct kimage_arch { + pgd_t *pgd; +#ifdef CONFIG_X86_PAE + pmd_t *pmd0; + pmd_t *pmd1; +#endif + pte_t *pte0; + pte_t *pte1; +}; +#endif + #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_KEXEC_H */ |