Signed-off-by: Greg Banks <gnb@xxxxxxx>
---
init/Kconfig | 8 ++++
kernel/Makefile | 1
kernel/test-dprintk.c | 67 +++++++++++++++++++++++++++++++++++++++
3 files changed, 76 insertions(+)
Index: bfields/kernel/test-dprintk.c
===================================================================
--- /dev/null
+++ bfields/kernel/test-dprintk.c
@@ -0,0 +1,67 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+#include <linux/dprintk.h>
+
+int foo(int x)
+{
+ dprintk("foo: x=%d\n", x);
+ return x+42;
+}
+
+int bar(int x)
+{
+ dprintk("bar: x=%d\n", x);
+ return x-3;
+}
+
+static ssize_t exp_write(struct file *file, const char __user *ubuf,
+ size_t len, loff_t *offp)
+{
+ char tmp[8];
+
+ if (*offp != 0 || len == 0)
+ return 0;
+ if (len > sizeof(tmp))
+ len = sizeof(tmp);
+
+ if (copy_from_user(tmp, ubuf, len))
+ return -EFAULT;
+
+ switch (tmp[0]) {
+ case 'f': foo(100); break;
+ case 'b': bar(100); break;
+ }
+
+ *offp += len;
+ return len;
+}
+
+static struct file_operations exp_fops = {
+ .write = exp_write,
+};
+
+static int __init exp_init(void)
+{
+ struct proc_dir_entry *pde;
+
+ printk("exp_init:\n");
+
+ pde = proc_create("foobar", 0200, NULL, &exp_fops);
+
+ return 0;
+}
+
+static void __exit exp_cleanup(void)
+{
+ printk("exp_cleanup:\n");
+ remove_proc_entry("foobar", NULL);
+}
+
+MODULE_LICENSE("GPL");
+module_init(exp_init);
+module_exit(exp_cleanup);
+
+/* vim:set ai sw=8 sts=8: */
Index: bfields/kernel/Makefile
===================================================================
--- bfields.orig/kernel/Makefile
+++ bfields/kernel/Makefile
@@ -90,6 +90,7 @@ obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_SLOW_WORK) += slow-work.o
obj-$(CONFIG_DPRINTK) += dprintk.o
+obj-$(CONFIG_DPRINTK_TEST) += test-dprintk.o
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@xxxxxxxxxxxxxxxx>, the -fno-omit-frame-pointer is
Index: bfields/init/Kconfig
===================================================================
--- bfields.orig/init/Kconfig
+++ bfields/init/Kconfig
@@ -849,6 +849,14 @@ config DPRINTK
See Documentation/dprintk-howto.txt for more details.
+config DPRINTK_TEST
+ default n
+ depends on DPRINTK
+ tristate "Test module for the dprintk module"
+
+ help
+ Enable this only if you are developing the dprintk module.
+
endmenu # General setup
config HAVE_GENERIC_DMA_COHERENT
--
--
Greg Banks, P.Engineer, SGI Australian Software Group.
the brightly coloured sporks of revolution.
I don't speak for SGI.
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