From 1d3468a6643a6a5905e2ac9ae1fa1aefc06d882a Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Mon, 10 Jul 2006 04:45:13 -0700 Subject: [PATCH] uml: move _kern.c files Move most *_kern.c files in arch/um/kernel to *.c. This makes UML somewhat more closely resemble the other arches. [akpm@osdl.org: use the new INTF_* flags] Signed-off-by: Jeff Dike Cc: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/kernel/sigio.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 arch/um/kernel/sigio.c (limited to 'arch/um/kernel/sigio.c') diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c new file mode 100644 index 00000000000..0ad755ceb21 --- /dev/null +++ b/arch/um/kernel/sigio.c @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#include "linux/kernel.h" +#include "linux/list.h" +#include "linux/slab.h" +#include "linux/signal.h" +#include "linux/interrupt.h" +#include "init.h" +#include "sigio.h" +#include "irq_user.h" +#include "irq_kern.h" +#include "os.h" + +/* Protected by sigio_lock() called from write_sigio_workaround */ +static int sigio_irq_fd = -1; + +static irqreturn_t sigio_interrupt(int irq, void *data, struct pt_regs *unused) +{ + char c; + + os_read_file(sigio_irq_fd, &c, sizeof(c)); + reactivate_fd(sigio_irq_fd, SIGIO_WRITE_IRQ); + return(IRQ_HANDLED); +} + +int write_sigio_irq(int fd) +{ + int err; + + err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt, + IRQF_DISABLED|IRQF_SAMPLE_RANDOM, "write sigio", + NULL); + if(err){ + printk("write_sigio_irq : um_request_irq failed, err = %d\n", + err); + return(-1); + } + sigio_irq_fd = fd; + return(0); +} + +static DEFINE_SPINLOCK(sigio_spinlock); + +void sigio_lock(void) +{ + spin_lock(&sigio_spinlock); +} + +void sigio_unlock(void) +{ + spin_unlock(&sigio_spinlock); +} -- cgit v1.2.3