arch/x86/kernel/e820.c: quiet sparse noise about plain integer as NULL pointer

The last parameter to sort() is a pointer to the function used to swap
items.  This parameter should be NULL, not 0, when not used.  This quiets
the following sparse warning:

warning: Using plain integer as NULL pointer

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Andrew Morton <>

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index f655f802260d69bbf3d80ffaeb9b30e32fe51124..d6bd85352c817873c1b8ec66ca158a2d21a4a684 100644 (file)
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -296,7 +296,7 @@ int __init sanitize_e820_map(struct e820entry *biosmap, int max_nr_map,
        chg_nr = chgidx;
 
        /* sort change-point list by memory addresses (low -> high) */
-       sort(change_point, chg_nr, sizeof *change_point, cpcompare, 0);
+       sort(change_point, chg_nr, sizeof *change_point, cpcompare, NULL);
 
        /* create a new bios memory map, removing overlaps */
        overlap_entries = 0;     /* number of entries in the overlap table */