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-rw-r--r--arch/arm/mm/init.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index c186474422f3..0cc8e04295a4 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -736,20 +736,29 @@ static int __mark_rodata_ro(void *unused)
return 0;
}
+static int kernel_set_to_readonly __read_mostly;
+
void mark_rodata_ro(void)
{
+ kernel_set_to_readonly = 1;
stop_machine(__mark_rodata_ro, NULL, NULL);
debug_checkwx();
}
void set_kernel_text_rw(void)
{
+ if (!kernel_set_to_readonly)
+ return;
+
set_section_perms(ro_perms, ARRAY_SIZE(ro_perms), false,
current->active_mm);
}
void set_kernel_text_ro(void)
{
+ if (!kernel_set_to_readonly)
+ return;
+
set_section_perms(ro_perms, ARRAY_SIZE(ro_perms), true,
current->active_mm);
}