Explain clearly why kmalloc() can't use __GFP_HIGHMEM.

Fix the wishy-washy comment to clearly explain why kmalloc() can't use the __GFP_HIGHMEM zone modifier. Signed-off-by: Robert P. J. Day <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
ambv · Oct 19, 2007 · 8518609 · 8518609
1 parent 3a4fa0a
commit 8518609
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mm/nommu.c b/mm/nommu.c
@@ -175,7 +175,8 @@ EXPORT_SYMBOL(vfree);
 void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
 {
 	/*
-	 * kmalloc doesn't like __GFP_HIGHMEM for some reason
+	 *  You can't specify __GFP_HIGHMEM with kmalloc() since kmalloc()
+	 * returns only a logical address.
 	 */
 	return kmalloc(size, (gfp_mask | __GFP_COMP) & ~__GFP_HIGHMEM);
 }