x86: shrink __PAGE_KERNEL/__PAGE_KERNEL_EXEC on non PAE kernels

[~andy/linux] / include / asm-x86 / vdso.h

diff --git a/include/asm-x86/vdso.h b/include/asm-x86/vdso.h
index 9379ec06fd1fb882d490c43d2dddc10e3c939c4f..629bcb6e8e45d6fd2050476540a465ba6bc3a1f8 100644 (file)
--- a/include/asm-x86/vdso.h
+++ b/include/asm-x86/vdso.h
@@ -1,6 +1,7 @@
 #ifndef _ASM_X86_VDSO_H
 #define _ASM_X86_VDSO_H        1
 
+#ifdef CONFIG_X86_64
 extern const char VDSO64_PRELINK[];
 
 /*
@@ -10,5 +11,18 @@ extern const char VDSO64_PRELINK[];
 #define VDSO64_SYMBOL(base, name) ({           \
        extern const char VDSO64_##name[];      \
        (void *) (VDSO64_##name - VDSO64_PRELINK + (unsigned long) (base)); })
+#endif
+
+#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
+extern const char VDSO32_PRELINK[];
+
+/*
+ * Given a pointer to the vDSO image, find the pointer to VDSO32_name
+ * as that symbol is defined in the vDSO sources or linker script.
+ */
+#define VDSO32_SYMBOL(base, name) ({           \
+       extern const char VDSO32_##name[];      \
+       (void *) (VDSO32_##name - VDSO32_PRELINK + (unsigned long) (base)); })
+#endif
 
 #endif /* asm-x86/vdso.h */