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>

2 files changed, 4 insertions, 4 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index d725676d84f3..e45a65e41686 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -293,7 +293,7 @@ EXPORT_SYMBOL_GPL(get_futex_key_refs);
  */
 void drop_futex_key_refs(union futex_key *key)
 {
-        if (key->both.ptr == 0)
+        if (!key->both.ptr)
                 return;
         switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) {
                 case FUT_OFF_INODE:
@@ -1046,7 +1046,7 @@ static int unqueue_me(struct futex_q *q)
  retry:
         lock_ptr = q->lock_ptr;
         barrier();
-        if (lock_ptr != 0) {
+        if (lock_ptr != NULL) {
                 spin_lock(lock_ptr);
                 /*
                  * q->lock_ptr can change between reading it and
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 7885269b0da2..e9f1b4ea504d 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -785,7 +785,7 @@ static int kimage_load_normal_segment(struct kimage *image,
                 size_t uchunk, mchunk;
 
                 page = kimage_alloc_page(image, GFP_HIGHUSER, maddr);
-                if (page == 0) {
+                if (!page) {
                         result  = -ENOMEM;
                         goto out;
                 }
@@ -844,7 +844,7 @@ static int kimage_load_crash_segment(struct kimage *image,
                 size_t uchunk, mchunk;
 
                 page = pfn_to_page(maddr >> PAGE_SHIFT);
-                if (page == 0) {
+                if (!page) {
                         result  = -ENOMEM;
                         goto out;
                 }