/* * 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. */ #define MACH_INCLUDE #include #include #include #include int bh_mask_count[32]; unsigned int bh_active = 0; unsigned int bh_mask = 0; void (*bh_base[32]) (void); void linux_soft_intr (void) { unsigned int active; unsigned int mask, left; void (**bh) (void); sti (); 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; if (!fn) goto bad_bh; fn (); } } return; bad_bh: printk ("linux_soft_intr:bad interrupt handler entry %08x\n", mask); }