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- /*
- * linux/kernel/softirq.c
- *
- * Copyright (C) 1992 Linus Torvalds
- *
- * do_bottom_half() runs at normal kernel priority: all interrupts
- * enabled. do_bottom_half() is atomic with respect to itself: a
- * bottom_half handler need not be re-entrant.
- */
-
- #include <linux/ptrace.h>
- #include <linux/errno.h>
- #include <linux/kernel_stat.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
- #include <linux/interrupt.h>
- #include <linux/mm.h>
-
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/bitops.h>
-
- #define INCLUDE_INLINE_FUNCS
- #include <linux/tqueue.h>
-
- unsigned long intr_count = 0;
-
- unsigned long bh_active = 0;
- unsigned long bh_mask = 0;
- struct bh_struct bh_base[32];
-
-
- asmlinkage void do_bottom_half(void)
- {
- unsigned long active;
- unsigned long mask, left;
- struct bh_struct *bh;
-
- bh = bh_base;
- active = bh_active & bh_mask;
- for (mask = 1, left = ~0 ; left & active ; bh++,mask += mask,left += left) {
- if (mask & active) {
- void (*fn)(void *);
- bh_active &= ~mask;
- fn = bh->routine;
- if (!fn)
- goto bad_bh;
- fn(bh->data);
- }
- }
- return;
- bad_bh:
- printk ("irq.c:bad bottom half entry %08lx\n", mask);
- }
-