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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/um/drivers/null.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/um/drivers/null.c')
-rw-r--r-- | kernel/arch/um/drivers/null.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/kernel/arch/um/drivers/null.c b/kernel/arch/um/drivers/null.c new file mode 100644 index 000000000..10495747c --- /dev/null +++ b/kernel/arch/um/drivers/null.c @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com) + * Licensed under the GPL + */ + +#include <stddef.h> +#include <errno.h> +#include <fcntl.h> +#include "chan_user.h" +#include <os.h> + +/* This address is used only as a unique identifier */ +static int null_chan; + +static void *null_init(char *str, int device, const struct chan_opts *opts) +{ + return &null_chan; +} + +static int null_open(int input, int output, int primary, void *d, + char **dev_out) +{ + int fd; + + *dev_out = NULL; + + fd = open(DEV_NULL, O_RDWR); + return (fd < 0) ? -errno : fd; +} + +static int null_read(int fd, char *c_out, void *unused) +{ + return -ENODEV; +} + +static void null_free(void *data) +{ +} + +const struct chan_ops null_ops = { + .type = "null", + .init = null_init, + .open = null_open, + .close = generic_close, + .read = null_read, + .write = generic_write, + .console_write = generic_console_write, + .window_size = generic_window_size, + .free = null_free, + .winch = 0, +}; |