[RFC 5/8] kmsg: device support in mem class
From: Marcin Niesluchowski <hidden>
Date: 2015-07-03 10:51:57
Also in:
lkml
Subsystem:
char and misc drivers, the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Linus Torvalds
Mem class is current class in which kmsg device is holded in. Mem class is exteded by kmsg_sys devices handling. Signed-off-by: Marcin Niesluchowski <redacted> --- drivers/char/mem.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index e518040..8d5ba0d 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c@@ -815,7 +815,11 @@ static int memory_open(struct inode *inode, struct file *filp) minor = iminor(inode); if (minor >= ARRAY_SIZE(devlist)) +#ifdef CONFIG_PRINTK + minor = KMSG_MINOR; +#else return -ENXIO; +#endif dev = &devlist[minor]; if (!dev->fops)
@@ -837,8 +841,20 @@ static const struct file_operations memory_fops = { static char *mem_devnode(struct device *dev, umode_t *mode) { - if (mode && devlist[MINOR(dev->devt)].mode) - *mode = devlist[MINOR(dev->devt)].mode; + int minor; + + if (!mode) + return NULL; + + minor = MINOR(dev->devt); + +#ifdef CONFIG_PRINTK + if (minor >= ARRAY_SIZE(devlist)) + kmsg_sys_mode(minor, mode); + else +#endif + if (devlist[minor].mode) + *mode = devlist[minor].mode; return NULL; }
--
1.9.1