sparc32: fix sparse warnings in ioport.c

Fix following warnings:
ioport.c:189:38: warning: Using plain integer as NULL pointer
ioport.c:78:25: warning: symbol 'sparc_iomap' was not declared. Should it be static?
ioport.c:403:20: warning: symbol 'sbus_dma_ops' was not declared. Should it be static?
ioport.c:684:39: warning: Using plain integer as NULL pointer

Add one missing prototype, and use NULL.
sbus_dma_ops declared static.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 5 insertions, 3 deletions

diff --git a/arch/sparc/include/asm/pgalloc_32.h b/arch/sparc/include/asm/pgalloc_32.h
index 9b1c36de0f18..a3890da94428 100644
--- a/arch/sparc/include/asm/pgalloc_32.h
+++ b/arch/sparc/include/asm/pgalloc_32.h
@@ -14,6 +14,8 @@ struct page;
 void *srmmu_get_nocache(int size, int align);
 void srmmu_free_nocache(void *addr, int size);
 
+extern struct resource sparc_iomap;
+
 #define check_pgt_cache()       do { } while (0)
 
 pgd_t *get_pgd_fast(void);
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index e7e215dfa866..7f08ec8a7c68 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -186,7 +186,7 @@ static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
 
         if (name == NULL) name = "???";
 
-        if ((xres = xres_alloc()) != 0) {
+        if ((xres = xres_alloc()) != NULL) {
                 tack = xres->xname;
                 res = &xres->xres;
         } else {
@@ -400,7 +400,7 @@ static void sbus_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
         BUG();
 }
 
-struct dma_map_ops sbus_dma_ops = {
+static struct dma_map_ops sbus_dma_ops = {
         .alloc                  = sbus_alloc_coherent,
         .free                   = sbus_free_coherent,
         .map_page               = sbus_map_page,
@@ -681,7 +681,7 @@ static int sparc_io_proc_show(struct seq_file *m, void *v)
         const char *nm;
 
         for (r = root->child; r != NULL; r = r->sibling) {
-                if ((nm = r->name) == 0) nm = "???";
+                if ((nm = r->name) == NULL) nm = "???";
                 seq_printf(m, "%016llx-%016llx: %s\n",
                                 (unsigned long long)r->start,
                                 (unsigned long long)r->end, nm);