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Subject[PATCH 2/2] chardev: showing minor range for chardev in the output of /proc/devices
Date
Currently chardev allows to share major, showing
major with minor range for chardev will be more
helpful.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
---
fs/char_dev.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/char_dev.c b/fs/char_dev.c
index b25b1da097d5..6f00acdeb308 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -55,7 +55,9 @@ void chrdev_show(struct seq_file *f, off_t offset)
mutex_lock(&chrdevs_lock);
for (cd = chrdevs[major_to_index(offset)]; cd; cd = cd->next) {
if (cd->major == offset)
- seq_printf(f, "%3d %s\n", cd->major, cd->name);
+ seq_printf(f, "%3d %s (%u-%u)\n", cd->major, cd->name,
+ cd->baseminor,
+ cd->baseminor + cd->minorct - 1);
}
mutex_unlock(&chrdevs_lock);
}
--
2.20.1
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