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[PATCH] RTC driver init adjustment 

- conditionalizes procfs code upon CONFIG_PROC_FS (to reduce code size when
  that option is not enabled)

- make initialization no longer fail when the procfs entry can't be
  allocated (namely would initialization always have failed when
  CONFIG_PROC_FS was not set)

- move the formerly file-scope static variable rtc_int_handler_ptr into
  the only function using it, and makes it automatic.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Beulich 2006-12-13 00:35:05 -08:00 committed by Linus Torvalds
parent f3e92d355e
commit 9cef779ec3
1 changed files with 17 additions and 15 deletions
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32
drivers/char/rtc.c
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@ -113,7 +113,7 @@ static int rtc_has_irq = 1;
#define hpet_set_rtc_irq_bit(arg) 0
#define hpet_rtc_timer_init() do { } while (0)
#define hpet_rtc_dropped_irq() 0
static inline irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id) {return 0;}
static irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id) {return 0;}
#else
extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
#endif
@ -165,7 +165,9 @@ static void mask_rtc_irq_bit(unsigned char bit)
}
#endif
#ifdef CONFIG_PROC_FS
static int rtc_proc_open(struct inode *inode, struct file *file);
#endif
/*
* Bits in rtc_status. (6 bits of room for future expansion)
@ -906,6 +908,7 @@ static struct miscdevice rtc_dev = {
.fops = &rtc_fops,
};
#ifdef CONFIG_PROC_FS
static const struct file_operations rtc_proc_fops = {
.owner = THIS_MODULE,
.open = rtc_proc_open,
@ -913,14 +916,13 @@ static const struct file_operations rtc_proc_fops = {
.llseek = seq_lseek,
.release = single_release,
};
#if defined(RTC_IRQ) && !defined(__sparc__)
static irq_handler_t rtc_int_handler_ptr;
#endif
static int __init rtc_init(void)
{
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *ent;
#endif
#if defined(__alpha__) || defined(__mips__)
unsigned int year, ctrl;
char *guess = NULL;
@ -932,9 +934,11 @@ static int __init rtc_init(void)
struct sparc_isa_bridge *isa_br;
struct sparc_isa_device *isa_dev;
#endif
#endif
#ifndef __sparc__
#else
void *r;
#ifdef RTC_IRQ
irq_handler_t rtc_int_handler_ptr;
#endif
#endif
#ifdef __sparc__
@ -1024,17 +1028,13 @@ no_irq:
return -ENODEV;
}
#ifdef CONFIG_PROC_FS
ent = create_proc_entry("driver/rtc", 0, NULL);
if (!ent) {
#ifdef RTC_IRQ
free_irq(RTC_IRQ, NULL);
rtc_has_irq = 0;
if (ent)
ent->proc_fops = &rtc_proc_fops;
else
printk(KERN_WARNING "rtc: Failed to register with procfs.\n");
#endif
release_region(RTC_PORT(0), RTC_IO_EXTENT);
misc_deregister(&rtc_dev);
return -ENOMEM;
}
ent->proc_fops = &rtc_proc_fops;
#if defined(__alpha__) || defined(__mips__)
rtc_freq = HZ;
@ -1167,6 +1167,7 @@ static void rtc_dropped_irq(unsigned long data)
}
#endif
#ifdef CONFIG_PROC_FS
/*
* Info exported via "/proc/driver/rtc".
*/
@ -1251,6 +1252,7 @@ static int rtc_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, rtc_proc_show, NULL);
}
#endif
void rtc_get_rtc_time(struct rtc_time *rtc_tm)
{