x86: make vmap yell louder when it is used under irqs_disabled()

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index a84ac7b570e6..6907b8e85d52 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -498,12 +498,12 @@ void *text_poke_early(void *addr, const void *opcode, size_t len)
  */
 void *__kprobes text_poke(void *addr, const void *opcode, size_t len)
 {
-        unsigned long flags;
         char *vaddr;
         int nr_pages = 2;
         struct page *pages[2];
         int i;
 
+        might_sleep();
         if (!core_kernel_text((unsigned long)addr)) {
                 pages[0] = vmalloc_to_page(addr);
                 pages[1] = vmalloc_to_page(addr + PAGE_SIZE);
@@ -517,9 +517,9 @@ void *__kprobes text_poke(void *addr, const void *opcode, size_t len)
                 nr_pages = 1;
         vaddr = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL);
         BUG_ON(!vaddr);
-        local_irq_save(flags);
+        local_irq_disable();
         memcpy(&vaddr[(unsigned long)addr & ~PAGE_MASK], opcode, len);
-        local_irq_restore(flags);
+        local_irq_enable();
         vunmap(vaddr);
         sync_core();
         /* Could also do a CLFLUSH here to speed up CPU recovery; but