When comparing a pointer, it's clearer to compare it to NULL than to 0.
Here is an excerpt of the semantic patch:
@@
expression *E;
@@
E ==
- 0
+ NULL
@@
expression *E;
@@
E !=
- 0
+ NULL
Signed-off-by: Yoann Padioleau <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
8xx_io/commproc.c | 2 +-
kernel/pci.c | 6 +++---
mm/init.c | 4 ++--
mm/mmu_decl.h | 2 +-
mm/pgtable.c | 4 ++--
mm/tlb.c | 12 ++++++------
syslib/btext.c | 4 ++--
syslib/open_pic.c | 14 +++++++-------
syslib/open_pic2.c | 14 +++++++-------
xmon/xmon.c | 4 ++--
10 files changed, 33 insertions(+), 33 deletions(-)
diff --git a/arch/ppc/8xx_io/commproc.c b/arch/ppc/8xx_io/commproc.c
index 7088428..e1e0084 100644
--- a/arch/ppc/8xx_io/commproc.c
+++ b/arch/ppc/8xx_io/commproc.c
@@ -293,7 +293,7 @@ cpm_install_handler(int cpm_vec, void (*
return;
}
- if (cpm_vecs[cpm_vec].handler != 0)
+ if (cpm_vecs[cpm_vec].handler != NULL)
printk(KERN_INFO "CPM interrupt %x replacing %x\n",
(uint)handler, (uint)cpm_vecs[cpm_vec].handler);
cpm_vecs[cpm_vec].handler = handler;
diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index c2ec13b..124b0a2 100644
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -880,7 +880,7 @@ static struct resource *__pci_mmap_make_
unsigned long io_offset = 0;
int i, res_bit;
- if (hose == 0)
+ if (hose == NULL)
return NULL; /* should never happen */
/* If memory, add on the PCI bridge address offset */
@@ -1261,9 +1261,9 @@ fake_pci_bus(struct pci_controller *hose
{
static struct pci_bus bus;
- if (hose == 0) {
+ if (hose == NULL) {
hose = pci_bus_to_hose(busnr);
- if (hose == 0)
+ if (hose == NULL)
printk(KERN_ERR "Can't find hose for PCI bus %d!\n", busnr);
}
bus.number = busnr;
diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
index 390dd19..a805f94 100644
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c
@@ -197,7 +197,7 @@ void MMU_setup(void)
char *p, *q;
unsigned long maxmem = 0;
- for (q = cmd_line; (p = strstr(q, "mem=")) != 0; ) {
+ for (q = cmd_line; (p = strstr(q, "mem=")) != NULL; ) {
q = p + 4;
if (p > cmd_line && p[-1] != ' ')
continue;
@@ -575,7 +575,7 @@ #endif
#ifdef CONFIG_PPC_STD_MMU
/* We only want HPTEs for linux PTEs that have _PAGE_ACCESSED set */
- if (Hash != 0 && pte_young(pte)) {
+ if (Hash != NULL && pte_young(pte)) {
struct mm_struct *mm;
pmd_t *pmd;
diff --git a/arch/ppc/mm/mmu_decl.h b/arch/ppc/mm/mmu_decl.h
index 540f329..0ff8967 100644
--- a/arch/ppc/mm/mmu_decl.h
+++ b/arch/ppc/mm/mmu_decl.h
@@ -76,7 +76,7 @@ extern unsigned long mmu_mapin_ram(void)
static inline void flush_HPTE(unsigned context, unsigned long va,
unsigned long pdval)
{
- if ((Hash != 0) &&
+ if ((Hash != NULL) &&
cpu_has_feature(CPU_FTR_HPTE_TABLE))
flush_hash_pages(0, va, pdval, 1);
else
diff --git a/arch/ppc/mm/pgtable.c b/arch/ppc/mm/pgtable.c
index 35ebb63..1ce8c56 100644
--- a/arch/ppc/mm/pgtable.c
+++ b/arch/ppc/mm/pgtable.c
@@ -219,7 +219,7 @@ __ioremap(phys_addr_t addr, unsigned lon
if (mem_init_done) {
struct vm_struct *area;
area = get_vm_area(size, VM_IOREMAP);
- if (area == 0)
+ if (area == NULL)
return NULL;
v = (unsigned long) area->addr;
} else {
@@ -283,7 +283,7 @@ map_page(unsigned long va, phys_addr_t p
pd = pmd_offset(pgd_offset_k(va), va);
/* Use middle 10 bits of VA to index the second-level map */
pg = pte_alloc_kernel(pd, va);
- if (pg != 0) {
+ if (pg != NULL) {
err = 0;
set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, __pgprot(flags)));
if (mem_init_done)
diff --git a/arch/ppc/mm/tlb.c b/arch/ppc/mm/tlb.c
index 4ff260b..d4b68bd 100644
--- a/arch/ppc/mm/tlb.c
+++ b/arch/ppc/mm/tlb.c
@@ -40,7 +40,7 @@ void flush_hash_entry(struct mm_struct *
{
unsigned long ptephys;
- if (Hash != 0) {
+ if (Hash != NULL) {
ptephys = __pa(ptep) & PAGE_MASK;
flush_hash_pages(mm->context.id, addr, ptephys, 1);
}
@@ -52,7 +52,7 @@ void flush_hash_entry(struct mm_struct *
*/
void flush_tlb_page_nohash(struct vm_area_struct *vma, unsigned long addr)
{
- if (Hash != 0)
+ if (Hash != NULL)
return;
_tlbie(addr);
}
@@ -63,7 +63,7 @@ void flush_tlb_page_nohash(struct vm_are
*/
void tlb_flush(struct mmu_gather *tlb)
{
- if (Hash == 0) {
+ if (Hash == NULL) {
/*
* 603 needs to flush the whole TLB here since
* it doesn't use a hash table.
@@ -104,7 +104,7 @@ static void flush_range(struct mm_struct
int count;
unsigned int ctx = mm->context.id;
- if (Hash == 0) {
+ if (Hash == NULL) {
_tlbia();
return;
}
@@ -144,7 +144,7 @@ void flush_tlb_mm(struct mm_struct *mm)
{
struct vm_area_struct *mp;
- if (Hash == 0) {
+ if (Hash == NULL) {
_tlbia();
return;
}
@@ -159,7 +159,7 @@ void flush_tlb_page(struct vm_area_struc
struct mm_struct *mm;
pmd_t *pmd;
- if (Hash == 0) {
+ if (Hash == NULL) {
_tlbie(vmaddr);
return;
}
diff --git a/arch/ppc/syslib/btext.c b/arch/ppc/syslib/btext.c
index d116670..6ce05f8 100644
--- a/arch/ppc/syslib/btext.c
+++ b/arch/ppc/syslib/btext.c
@@ -202,7 +202,7 @@ map_boot_text(void)
size = bi->dispDeviceRowBytes * bi->dispDeviceRect[3] + offset
+ bi->dispDeviceRect[0];
vbase = ioremap(base, size);
- if (vbase == 0)
+ if (vbase == NULL)
return;
bi->logicalDisplayBase = vbase + offset;
boot_text_mapped = 1;
@@ -215,7 +215,7 @@ calc_base(boot_infos_t *bi, int x, int y
unsigned char *base;
base = bi->logicalDisplayBase;
- if (base == 0)
+ if (base == NULL)
base = bi->dispDeviceBase;
base += (x + bi->dispDeviceRect[0]) * (bi->dispDeviceDepth >> 3);
base += (y + bi->dispDeviceRect[1]) * bi->dispDeviceRowBytes;
diff --git a/arch/ppc/syslib/open_pic.c b/arch/ppc/syslib/open_pic.c
index 18ec947..f9bf2d6 100644
--- a/arch/ppc/syslib/open_pic.c
+++ b/arch/ppc/syslib/open_pic.c
@@ -142,7 +142,7 @@ #define check_arg_pri(pri) \
*/
#define check_arg_irq(irq) \
if (irq < open_pic_irq_offset || irq >= NumSources+open_pic_irq_offset \
- || ISR[irq - open_pic_irq_offset] == 0) { \
+ || ISR[irq - open_pic_irq_offset] == NULL) { \
printk("open_pic.c:%d: invalid irq %d\n", __LINE__, irq); \
dump_stack(); }
#define check_arg_cpu(cpu) \
@@ -290,7 +290,7 @@ void __init openpic_set_sources(int firs
last_irq = first_irq + num_irqs;
if (last_irq > NumSources)
NumSources = last_irq;
- if (src == 0)
+ if (src == NULL)
src = &((struct OpenPIC __iomem *)OpenPIC_Addr)->Source[first_irq];
for (i = first_irq; i < last_irq; ++i, ++src)
ISR[i] = src;
@@ -385,7 +385,7 @@ #endif
for (i = 0; i < NumSources; i++) {
int sense;
- if (ISR[i] == 0)
+ if (ISR[i] == NULL)
continue;
/* the bootloader may have left it enabled (bad !) */
@@ -791,7 +791,7 @@ openpic_initirq(u_int irq, u_int pri, u_
*/
static void openpic_mapirq(u_int irq, cpumask_t physmask, cpumask_t keepmask)
{
- if (ISR[irq] == 0)
+ if (ISR[irq] == NULL)
return;
if (!cpus_empty(keepmask)) {
cpumask_t irqdest = { .bits[0] = openpic_read(&ISR[irq]->Destination) };
@@ -809,7 +809,7 @@ #ifdef notused
*/
static void openpic_set_sense(u_int irq, int sense)
{
- if (ISR[irq] != 0)
+ if (ISR[irq] != NULL)
openpic_safe_writefield(&ISR[irq]->Vector_Priority,
OPENPIC_SENSE_LEVEL,
(sense ? OPENPIC_SENSE_LEVEL : 0));
@@ -974,7 +974,7 @@ int openpic_suspend(struct sys_device *s
for (i=0; i<OPENPIC_NUM_IPI; i++)
save_ipi_vp[i] = openpic_read(&OpenPIC->Global.IPI_Vector_Priority(i));
for (i=0; i<NumSources; i++) {
- if (ISR[i] == 0)
+ if (ISR[i] == NULL)
continue;
save_irq_src_vp[i] = openpic_read(&ISR[i]->Vector_Priority) & ~OPENPIC_ACTIVITY;
save_irq_src_dest[i] = openpic_read(&ISR[i]->Destination);
@@ -1016,7 +1016,7 @@ int openpic_resume(struct sys_device *sy
openpic_write(&OpenPIC->Global.IPI_Vector_Priority(i),
save_ipi_vp[i]);
for (i=0; i<NumSources; i++) {
- if (ISR[i] == 0)
+ if (ISR[i] == NULL)
continue;
openpic_write(&ISR[i]->Destination, save_irq_src_dest[i]);
openpic_write(&ISR[i]->Vector_Priority, save_irq_src_vp[i]);
diff --git a/arch/ppc/syslib/open_pic2.c b/arch/ppc/syslib/open_pic2.c
index d585207..4028c78 100644
--- a/arch/ppc/syslib/open_pic2.c
+++ b/arch/ppc/syslib/open_pic2.c
@@ -115,7 +115,7 @@ #define check_arg_pri(pri) \
extern unsigned long* _get_SP(void);
#define check_arg_irq(irq) \
if (irq < open_pic2_irq_offset || irq >= NumSources+open_pic2_irq_offset \
- || ISR[irq - open_pic2_irq_offset] == 0) { \
+ || ISR[irq - open_pic2_irq_offset] == NULL) { \
printk("open_pic.c:%d: illegal irq %d\n", __LINE__, irq); \
/*print_backtrace(_get_SP());*/ }
#define check_arg_cpu(cpu) \
@@ -192,7 +192,7 @@ void __init openpic2_set_sources(int fir
last_irq = first_irq + num_irqs;
if (last_irq > NumSources)
NumSources = last_irq;
- if (src == 0)
+ if (src == NULL)
src = &((struct OpenPIC *)OpenPIC2_Addr)->Source[first_irq];
for (i = first_irq; i < last_irq; ++i, ++src)
ISR[i] = src;
@@ -268,7 +268,7 @@ void __init openpic2_init(int offset)
for (i = 0; i < NumSources; i++) {
int sense;
- if (ISR[i] == 0)
+ if (ISR[i] == NULL)
continue;
/* the bootloader may have left it enabled (bad !) */
@@ -491,7 +491,7 @@ openpic2_initirq(u_int irq, u_int pri, u
*/
static void openpic2_mapirq(u_int irq, u_int physmask, u_int keepmask)
{
- if (ISR[irq] == 0)
+ if (ISR[irq] == NULL)
return;
if (keepmask != 0)
physmask |= openpic2_read(&ISR[irq]->Destination) & keepmask;
@@ -506,7 +506,7 @@ #ifdef notused
*/
static void openpic2_set_sense(u_int irq, int sense)
{
- if (ISR[irq] != 0)
+ if (ISR[irq] != NULL)
openpic2_safe_writefield(&ISR[irq]->Vector_Priority,
OPENPIC_SENSE_LEVEL,
(sense ? OPENPIC_SENSE_LEVEL : 0));
@@ -596,7 +596,7 @@ int openpic2_suspend(struct sys_device *
for (i=0; i<OPENPIC_NUM_IPI; i++)
save_ipi_vp[i] = openpic2_read(&OpenPIC2->Global.IPI_Vector_Priority(i));
for (i=0; i<NumSources; i++) {
- if (ISR[i] == 0)
+ if (ISR[i] == NULL)
continue;
save_irq_src_vp[i] = openpic2_read(&ISR[i]->Vector_Priority) & ~OPENPIC_ACTIVITY;
save_irq_src_dest[i] = openpic2_read(&ISR[i]->Destination);
@@ -640,7 +640,7 @@ int openpic2_resume(struct sys_device *s
openpic2_write(&OpenPIC2->Global.IPI_Vector_Priority(i),
save_ipi_vp[i]);
for (i=0; i<NumSources; i++) {
- if (ISR[i] == 0)
+ if (ISR[i] == NULL)
continue;
openpic2_write(&ISR[i]->Destination, save_irq_src_dest[i]);
openpic2_write(&ISR[i]->Vector_Priority, save_irq_src_vp[i]);
diff --git a/arch/ppc/xmon/xmon.c b/arch/ppc/xmon/xmon.c
index b1a9174..068c064 100644
--- a/arch/ppc/xmon/xmon.c
+++ b/arch/ppc/xmon/xmon.c
@@ -737,7 +737,7 @@ #endif
printf("All breakpoints cleared\n");
} else {
bp = at_breakpoint(a);
- if (bp == 0) {
+ if (bp == NULL) {
printf("No breakpoint at %x\n", a);
} else {
bp->enabled = 0;
@@ -770,7 +770,7 @@ #endif
break;
}
bp = at_breakpoint(a);
- if (bp == 0) {
+ if (bp == NULL) {
for (bp = bpts; bp < &bpts[NBPTS]; ++bp)
if (!bp->enabled)
break;
-
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