kvfree(): fix misleading comment

vfree() might sleep if called not in interrupt context.  So does kvfree()
too.  Fix misleading kvfree()'s comment about allowed context.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: 04b8e94 ("mm/util.c: improve kvfree() kerneldoc")
Signed-off-by: Andrey Ryabinin <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: aryabinin

mm/util.c

@@ -435,7 +435,7 @@ EXPORT_SYMBOL(kvmalloc_node);
  * It is slightly more efficient to use kfree() or vfree() if you are certain
  * that you know which one to use.
  *
- * Context: Any context except NMI.
+ * Context: Either preemptible task context or not-NMI interrupt.
  */
 void kvfree(const void *addr)
 {