[PATCH] x86/x86_64: mark rodata section read only: generic infrastructure
Generic prep-work for marking the .rodata section readonly:
* Align the rodata section at 4Kb boundary
* call the mark_rodata_ro() function when available
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/init/main.c b/init/main.c
index 54aaf56..2ed3638 100644
--- a/init/main.c
+++ b/init/main.c
@@ -52,6 +52,7 @@
#include <asm/bugs.h>
#include <asm/setup.h>
#include <asm/sections.h>
+#include <asm/cacheflush.h>
/*
* This is one of the first .c files built. Error out early
@@ -99,6 +100,9 @@
#else
static inline void acpi_early_init(void) { }
#endif
+#ifndef CONFIG_DEBUG_RODATA
+static inline void mark_rodata_ro(void) { }
+#endif
#ifdef CONFIG_TC
extern void tc_init(void);
@@ -708,6 +712,7 @@
*/
free_initmem();
unlock_kernel();
+ mark_rodata_ro();
system_state = SYSTEM_RUNNING;
numa_default_policy();