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authorHuang Ying <ying.huang@intel.com>2008-10-31 04:48:08 +0300
committerIngo Molnar <mingo@elte.hu>2008-10-31 12:01:56 +0300
commit92be3d6bdf2cb34972ab50e12ad4da1076e690da (patch)
tree6ed10cb8a14615ca0bda48f64520c82480397d00 /arch/x86/include/asm/kexec.h
parent31498a01496ffca3b542bae72b8ec499cd9302db (diff)
downloadlinux-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.h14
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 */