Return to softirq.c CVS log

Up to [GnuMach] / Gnu-Mach / linux / src / kernel

Annotation of Gnu-Mach/linux/src/kernel/softirq.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  *     linux/kernel/softirq.c
                      3:  *
                      4:  *     Copyright (C) 1992 Linus Torvalds
                      5:  *
                      6:  * do_bottom_half() runs at normal kernel priority: all interrupts
                      7:  * enabled.  do_bottom_half() is atomic with respect to itself: a
                      8:  * bottom_half handler need not be re-entrant.
                      9:  */
                     10: 
                     11: #include <linux/ptrace.h>
                     12: #include <linux/errno.h>
                     13: #include <linux/kernel_stat.h>
                     14: #include <linux/signal.h>
                     15: #include <linux/sched.h>
                     16: #include <linux/interrupt.h>
                     17: #include <linux/mm.h>
                     18: 
                     19: #include <asm/system.h>
                     20: #include <asm/io.h>
                     21: #include <asm/irq.h>
                     22: #include <asm/bitops.h>
                     23: 
                     24: unsigned long intr_count = 0;
                     25: 
                     26: int bh_mask_count[32];
                     27: unsigned long bh_active = 0;
                     28: unsigned long bh_mask = 0;
                     29: void (*bh_base[32])(void);
                     30: 
                     31: 
                     32: asmlinkage void do_bottom_half(void)
                     33: {
                     34:        unsigned long active;
                     35:        unsigned long mask, left;
                     36:        void (**bh)(void);
                     37: 
                     38:        sti();
                     39:        bh = bh_base;
                     40:        active = bh_active & bh_mask;
                     41:        for (mask = 1, left = ~0 ; left & active ; bh++,mask += mask,left += left) {
                     42:                if (mask & active) {
                     43:                        void (*fn)(void);
                     44:                        bh_active &= ~mask;
                     45:                        fn = *bh;
                     46:                        if (!fn)
                     47:                                goto bad_bh;
                     48:                        fn();
                     49:                }
                     50:        }
                     51:        return;
                     52: bad_bh:
                     53:        printk ("irq.c:bad bottom half entry %08lx\n", mask);
                     54: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.