x86: cpa: move flush to cpa

The set_memory_* and set_pages_* family of API's currently requires the
callers to do a global tlb flush after the function call; forgetting this is
a very nasty deathtrap. This patch moves the global tlb flush into
each of the callers

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 10 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 4757be7b5e55..9b69fa54a831 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -610,22 +610,12 @@ void mark_rodata_ro(void)
         printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
                (end - start) >> 10);
 
-        /*
-         * set_memory_*() requires a global_flush_tlb() call after it.
-         * We do this after the printk so that if something went wrong in the
-         * change, the printk gets out at least to give a better debug hint
-         * of who is the culprit.
-         */
-        global_flush_tlb();
-
 #ifdef CONFIG_CPA_DEBUG
         printk("Testing CPA: undo %lx-%lx\n", start, end);
         set_memory_rw(start, (end-start) >> PAGE_SHIFT);
-        global_flush_tlb();
 
         printk("Testing CPA: again\n");
         set_memory_ro(start, (end-start) >> PAGE_SHIFT);
-        global_flush_tlb();
 #endif
 }
 #endif