sparse pointer use of zero as null

Get rid of sparse related warnings from places that use integer as NULL
pointer.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Ian Kent <raven@themaw.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 4 insertions, 4 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ae2959bb59cb..034617f8cdb2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1020,7 +1020,7 @@ static long region_chg(struct list_head *head, long f, long t)
          * size such that we can guarentee to record the reservation. */
         if (&rg->link == head || t < rg->from) {
                 nrg = kmalloc(sizeof(*nrg), GFP_KERNEL);
-                if (nrg == 0)
+                if (!nrg)
                         return -ENOMEM;
                 nrg->from = f;
                 nrg->to   = f;
diff --git a/mm/mremap.c b/mm/mremap.c
index 8ea5c2412c6e..08e3c7f2bd15 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -291,7 +291,7 @@ unsigned long do_mremap(unsigned long addr,
                 if ((addr <= new_addr) && (addr+old_len) > new_addr)
                         goto out;
 
-                ret = security_file_mmap(0, 0, 0, 0, new_addr, 1);
+                ret = security_file_mmap(NULL, 0, 0, 0, new_addr, 1);
                 if (ret)
                         goto out;
 
@@ -399,7 +399,7 @@ unsigned long do_mremap(unsigned long addr,
                                 goto out;
                         }
 
-                        ret = security_file_mmap(0, 0, 0, 0, new_addr, 1);
+                        ret = security_file_mmap(NULL, 0, 0, 0, new_addr, 1);
                         if (ret)
                                 goto out;
                 }
diff --git a/mm/vmscan.c b/mm/vmscan.c
index e1471385d001..cb474cc99645 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1282,7 +1282,7 @@ out:
          */
         if (priority < 0)
                 priority = 0;
-        for (i = 0; zones[i] != 0; i++) {
+        for (i = 0; zones[i] != NULL; i++) {
                 struct zone *zone = zones[i];
 
                 if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))