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authorJesper Juhl <jesper.juhl@gmail.com>2006-05-01 12:15:57 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-01 18:17:44 -0700
commit191ef966ac164a1ce3e06290ca52296744a4aee2 (patch)
tree0b141e946ed9ff65d94d393ba15384b958793586 /arch/um
parent893bb96a29bee4a5cf2486720ac79412aaee5066 (diff)
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[PATCH] uml: remove NULL checks and add some CodingStyle
Remove redundant NULL checks before [kv]free + small CodingStyle cleanup for arch/ Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/kernel/irq.c93
-rw-r--r--arch/um/os-Linux/irq.c47
2 files changed, 69 insertions, 71 deletions
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index c39ea3abeda..2ffda012385 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -89,16 +89,18 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
struct irq_fd *irq_fd;
int n;
- if(smp_sigio_handler()) return;
- while(1){
+ if (smp_sigio_handler())
+ return;
+
+ while (1) {
n = os_waiting_for_events(active_fds);
if (n <= 0) {
if(n == -EINTR) continue;
else break;
}
- for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){
- if(irq_fd->current_events != 0){
+ for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+ if (irq_fd->current_events != 0) {
irq_fd->current_events = 0;
do_IRQ(irq_fd->irq, regs);
}
@@ -110,19 +112,17 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
static void maybe_sigio_broken(int fd, int type)
{
- if(os_isatty(fd)){
- if((type == IRQ_WRITE) && !pty_output_sigio){
+ if (os_isatty(fd)) {
+ if ((type == IRQ_WRITE) && !pty_output_sigio) {
write_sigio_workaround();
add_sigio_fd(fd, 0);
- }
- else if((type == IRQ_READ) && !pty_close_sigio){
+ } else if ((type == IRQ_READ) && !pty_close_sigio) {
write_sigio_workaround();
add_sigio_fd(fd, 1);
}
}
}
-
int activate_fd(int irq, int fd, int type, void *dev_id)
{
struct pollfd *tmp_pfd;
@@ -132,16 +132,18 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
pid = os_getpid();
err = os_set_fd_async(fd, pid);
- if(err < 0)
+ if (err < 0)
goto out;
new_fd = um_kmalloc(sizeof(*new_fd));
err = -ENOMEM;
- if(new_fd == NULL)
+ if (new_fd == NULL)
goto out;
- if(type == IRQ_READ) events = UM_POLLIN | UM_POLLPRI;
- else events = UM_POLLOUT;
+ if (type == IRQ_READ)
+ events = UM_POLLIN | UM_POLLPRI;
+ else
+ events = UM_POLLOUT;
*new_fd = ((struct irq_fd) { .next = NULL,
.id = dev_id,
.fd = fd,
@@ -165,8 +167,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
* a semaphore.
*/
flags = irq_lock();
- for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){
- if((irq_fd->fd == fd) && (irq_fd->type == type)){
+ for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+ if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
printk("Registering fd %d twice\n", fd);
printk("Irqs : %d, %d\n", irq_fd->irq, irq);
printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id);
@@ -175,13 +177,13 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
}
/*-------------*/
- if(type == IRQ_WRITE)
+ if (type == IRQ_WRITE)
fd = -1;
tmp_pfd = NULL;
n = 0;
- while(1){
+ while (1) {
n = os_create_pollfd(fd, events, tmp_pfd, n);
if (n == 0)
break;
@@ -198,10 +200,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
* then we free the buffer tmp_fds and try again.
*/
irq_unlock(flags);
- if (tmp_pfd != NULL) {
- kfree(tmp_pfd);
- tmp_pfd = NULL;
- }
+ kfree(tmp_pfd);
+ tmp_pfd = NULL;
tmp_pfd = um_kmalloc(n);
if (tmp_pfd == NULL)
@@ -249,7 +249,7 @@ static int same_irq_and_dev(struct irq_fd *irq, void *d)
{
struct irq_and_dev *data = d;
- return((irq->irq == data->irq) && (irq->id == data->dev));
+ return ((irq->irq == data->irq) && (irq->id == data->dev));
}
void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
@@ -262,7 +262,7 @@ void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
static int same_fd(struct irq_fd *irq, void *fd)
{
- return(irq->fd == *((int *) fd));
+ return (irq->fd == *((int *)fd));
}
void free_irq_by_fd(int fd)
@@ -276,16 +276,17 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
int i = 0;
int fdi;
- for(irq=active_fds; irq != NULL; irq = irq->next){
- if((irq->fd == fd) && (irq->irq == irqnum)) break;
+ for (irq = active_fds; irq != NULL; irq = irq->next) {
+ if ((irq->fd == fd) && (irq->irq == irqnum))
+ break;
i++;
}
- if(irq == NULL){
+ if (irq == NULL) {
printk("find_irq_by_fd doesn't have descriptor %d\n", fd);
goto out;
}
fdi = os_get_pollfd(i);
- if((fdi != -1) && (fdi != fd)){
+ if ((fdi != -1) && (fdi != fd)) {
printk("find_irq_by_fd - mismatch between active_fds and "
"pollfds, fd %d vs %d, need %d\n", irq->fd,
fdi, fd);
@@ -294,7 +295,7 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
}
*index_out = i;
out:
- return(irq);
+ return irq;
}
void reactivate_fd(int fd, int irqnum)
@@ -305,7 +306,7 @@ void reactivate_fd(int fd, int irqnum)
flags = irq_lock();
irq = find_irq_by_fd(fd, irqnum, &i);
- if(irq == NULL){
+ if (irq == NULL) {
irq_unlock(flags);
return;
}
@@ -326,7 +327,7 @@ void deactivate_fd(int fd, int irqnum)
flags = irq_lock();
irq = find_irq_by_fd(fd, irqnum, &i);
- if(irq == NULL)
+ if (irq == NULL)
goto out;
os_set_pollfd(i, -1);
out:
@@ -338,15 +339,15 @@ int deactivate_all_fds(void)
struct irq_fd *irq;
int err;
- for(irq=active_fds;irq != NULL;irq = irq->next){
+ for (irq = active_fds; irq != NULL; irq = irq->next) {
err = os_clear_fd_async(irq->fd);
- if(err)
- return(err);
+ if (err)
+ return err;
}
/* If there is a signal already queued, after unblocking ignore it */
os_set_ioignore();
- return(0);
+ return 0;
}
void forward_interrupts(int pid)
@@ -356,9 +357,9 @@ void forward_interrupts(int pid)
int err;
flags = irq_lock();
- for(irq=active_fds;irq != NULL;irq = irq->next){
+ for (irq = active_fds; irq != NULL; irq = irq->next) {
err = os_set_owner(irq->fd, pid);
- if(err < 0){
+ if (err < 0) {
/* XXX Just remove the irq rather than
* print out an infinite stream of these
*/
@@ -379,7 +380,7 @@ void forward_interrupts(int pid)
unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
{
irq_enter();
- __do_IRQ(irq, (struct pt_regs *) regs);
+ __do_IRQ(irq, (struct pt_regs *)regs);
irq_exit();
return 1;
}
@@ -392,12 +393,12 @@ int um_request_irq(unsigned int irq, int fd, int type,
int err;
err = request_irq(irq, handler, irqflags, devname, dev_id);
- if(err)
- return(err);
+ if (err)
+ return err;
- if(fd != -1)
+ if (fd != -1)
err = activate_fd(irq, fd, type, dev_id);
- return(err);
+ return err;
}
EXPORT_SYMBOL(um_request_irq);
EXPORT_SYMBOL(reactivate_fd);
@@ -409,7 +410,7 @@ unsigned long irq_lock(void)
unsigned long flags;
spin_lock_irqsave(&irq_spinlock, flags);
- return(flags);
+ return flags;
}
void irq_unlock(unsigned long flags)
@@ -452,7 +453,7 @@ void __init init_IRQ(void)
irq_desc[TIMER_IRQ].depth = 1;
irq_desc[TIMER_IRQ].handler = &SIGVTALRM_irq_type;
enable_irq(TIMER_IRQ);
- for(i=1;i<NR_IRQS;i++){
+ for (i = 1; i < NR_IRQS; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = NULL;
irq_desc[i].depth = 1;
@@ -467,7 +468,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
int fds[2], err;
err = os_pipe(fds, 1, 1);
- if(err){
+ if (err) {
printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
goto out;
}
@@ -475,7 +476,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
err = um_request_irq(irq, fds[0], IRQ_READ, handler,
SA_INTERRUPT | SA_SAMPLE_RANDOM, name,
(void *) (long) fds[0]);
- if(err){
+ if (err) {
printk("init_aio_irq - : um_request_irq failed, err = %d\n",
err);
goto out_close;
@@ -488,5 +489,5 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
os_close_file(fds[0]);
os_close_file(fds[1]);
out:
- return(err);
+ return err;
}
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index e599be423da..3788d4568d3 100644
--- a/arch/um/os-Linux/irq.c
+++ b/arch/um/os-Linux/irq.c
@@ -29,21 +29,21 @@ int os_waiting_for_events(struct irq_fd *active_fds)
int i, n, err;
n = poll(pollfds, pollfds_num, 0);
- if(n < 0){
+ if (n < 0) {
err = -errno;
- if(errno != EINTR)
+ if (errno != EINTR)
printk("sigio_handler: os_waiting_for_events:"
" poll returned %d, errno = %d\n", n, errno);
return err;
}
- if(n == 0)
+ if (n == 0)
return 0;
irq_fd = active_fds;
- for(i = 0; i < pollfds_num; i++){
- if(pollfds[i].revents != 0){
+ for (i = 0; i < pollfds_num; i++) {
+ if (pollfds[i].revents != 0) {
irq_fd->current_events = pollfds[i].revents;
pollfds[i].fd = -1;
}
@@ -54,7 +54,7 @@ int os_waiting_for_events(struct irq_fd *active_fds)
int os_isatty(int fd)
{
- return(isatty(fd));
+ return isatty(fd);
}
int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds)
@@ -65,7 +65,7 @@ int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds)
return((pollfds_size + 1) * sizeof(pollfds[0]));
}
- if(pollfds != NULL){
+ if (pollfds != NULL) {
memcpy(tmp_pfd, pollfds,
sizeof(pollfds[0]) * pollfds_size);
/* remove old pollfds */
@@ -73,18 +73,15 @@ int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds)
}
pollfds = tmp_pfd;
pollfds_size++;
- } else {
- /* remove not used tmp_pfd */
- if (tmp_pfd != NULL)
- kfree(tmp_pfd);
- }
+ } else
+ kfree(tmp_pfd); /* remove not used tmp_pfd */
- pollfds[pollfds_num] = ((struct pollfd) { .fd = fd,
- .events = events,
- .revents = 0 });
+ pollfds[pollfds_num] = ((struct pollfd) { .fd = fd,
+ .events = events,
+ .revents = 0 });
pollfds_num++;
- return(0);
+ return 0;
}
void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
@@ -94,11 +91,11 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
int i = 0;
prev = &active_fds;
- while(*prev != NULL){
- if((*test)(*prev, arg)){
+ while (*prev != NULL) {
+ if ((*test)(*prev, arg)) {
struct irq_fd *old_fd = *prev;
- if((pollfds[i].fd != -1) &&
- (pollfds[i].fd != (*prev)->fd)){
+ if ((pollfds[i].fd != -1) &&
+ (pollfds[i].fd != (*prev)->fd)) {
printk("os_free_irq_by_cb - mismatch between "
"active_fds and pollfds, fd %d vs %d\n",
(*prev)->fd, pollfds[i].fd);
@@ -110,7 +107,6 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
/* This moves the *whole* array after pollfds[i]
* (though it doesn't spot as such)!
*/
-
memmove(&pollfds[i], &pollfds[i + 1],
(pollfds_num - i) * sizeof(pollfds[0]));
if(*last_irq_ptr2 == &old_fd->next)
@@ -129,10 +125,9 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
return;
}
-
int os_get_pollfd(int i)
{
- return(pollfds[i].fd);
+ return pollfds[i].fd;
}
void os_set_pollfd(int i, int fd)
@@ -151,8 +146,10 @@ void init_irq_signals(int on_sigstack)
int flags;
flags = on_sigstack ? SA_ONSTACK : 0;
- if(timer_irq_inited) h = (__sighandler_t) alarm_handler;
- else h = boot_timer_handler;
+ if (timer_irq_inited)
+ h = (__sighandler_t)alarm_handler;
+ else
+ h = boot_timer_handler;
set_handler(SIGVTALRM, h, flags | SA_RESTART,
SIGUSR1, SIGIO, SIGWINCH, SIGALRM, -1);