* [PATCH] init/do_mounts: Add create_dev() failure log
[not found] <130285@samsung.com>
@ 2015-05-25 5:17 ` Vishnu Pratap Singh
2015-05-25 12:59 ` Pavel Machek
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Vishnu Pratap Singh @ 2015-05-25 5:17 UTC (permalink / raw)
To: paul.gortmaker, snitzer, dehrenberg, pavel, akpm, mszeredi, linux-kernel
Cc: cpgs, Vishnu Pratap Singh
if create_dev() function fails to create the root mount device (/dev/root),
then it goes to panic as root device not found but there is no check/log
present in case of failure, So i have added the log in case it fails to create
the root device. It will help in debugging.
Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
---
init/do_mounts.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 8369ffa..a68aaf6 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -532,7 +532,8 @@ void __init mount_root(void)
}
#endif
#ifdef CONFIG_BLOCK
- create_dev("/dev/root", ROOT_DEV);
+ if(create_dev("/dev/root", ROOT_DEV) < 0)
+ printk(KERN_ERR "Failed to create %s device !!\n", "/dev/root");
mount_block_root("/dev/root", root_mountflags);
#endif
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH] init/do_mounts: Add create_dev() failure log
2015-05-25 5:17 ` [PATCH] init/do_mounts: Add create_dev() failure log Vishnu Pratap Singh
@ 2015-05-25 12:59 ` Pavel Machek
2015-05-25 13:49 ` Vishnu Pratap Singh
2015-05-26 6:26 ` [PATCHv2] " Vishnu Pratap Singh
2 siblings, 0 replies; 7+ messages in thread
From: Pavel Machek @ 2015-05-25 12:59 UTC (permalink / raw)
To: Vishnu Pratap Singh
Cc: paul.gortmaker, snitzer, dehrenberg, akpm, mszeredi, linux-kernel, cpgs
On Mon 2015-05-25 10:47:50, Vishnu Pratap Singh wrote:
> if create_dev() function fails to create the root mount device (/dev/root),
> then it goes to panic as root device not found but there is no check/log
> present in case of failure, So i have added the log in case it fails to create
> the root device. It will help in debugging.
>
> Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
> ---
> init/do_mounts.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/init/do_mounts.c b/init/do_mounts.c
> index 8369ffa..a68aaf6 100644
> --- a/init/do_mounts.c
> +++ b/init/do_mounts.c
> @@ -532,7 +532,8 @@ void __init mount_root(void)
> }
> #endif
> #ifdef CONFIG_BLOCK
> - create_dev("/dev/root", ROOT_DEV);
> + if(create_dev("/dev/root", ROOT_DEV) < 0)
> + printk(KERN_ERR "Failed to create %s device !!\n", "/dev/root");
But please make it "if (" and " !!" -> "!"
Thanks,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH] init/do_mounts: Add create_dev() failure log
2015-05-25 5:17 ` [PATCH] init/do_mounts: Add create_dev() failure log Vishnu Pratap Singh
2015-05-25 12:59 ` Pavel Machek
@ 2015-05-25 13:49 ` Vishnu Pratap Singh
2015-05-26 6:25 ` Pavel Machek
2015-05-26 6:26 ` [PATCHv2] " Vishnu Pratap Singh
2 siblings, 1 reply; 7+ messages in thread
From: Vishnu Pratap Singh @ 2015-05-25 13:49 UTC (permalink / raw)
To: paul.gortmaker, snitzer, dehrenberg, pavel, akpm, mszeredi, linux-kernel
Cc: cpgs, Vishnu Pratap Singh
if create_dev() function fails to create the root mount device (/dev/root),
then it goes to panic as root device not found but there is no check/log
present in case of failure, So i have added the log in case it fails to create
the root device. It will help in debugging.
Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
---
init/do_mounts.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 8369ffa..a68aaf6 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -532,7 +532,8 @@ void __init mount_root(void)
}
#endif
#ifdef CONFIG_BLOCK
- create_dev("/dev/root", ROOT_DEV);
+ if(create_dev("/dev/root", ROOT_DEV) < 0)
+ printk(KERN_ERR "Failed to create %s device !!\n", "/dev/root");
mount_block_root("/dev/root", root_mountflags);
#endif
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH] init/do_mounts: Add create_dev() failure log
2015-05-25 13:49 ` Vishnu Pratap Singh
@ 2015-05-26 6:25 ` Pavel Machek
0 siblings, 0 replies; 7+ messages in thread
From: Pavel Machek @ 2015-05-26 6:25 UTC (permalink / raw)
To: Vishnu Pratap Singh
Cc: paul.gortmaker, snitzer, dehrenberg, akpm, mszeredi, linux-kernel, cpgs
On Mon 2015-05-25 19:19:43, Vishnu Pratap Singh wrote:
> if create_dev() function fails to create the root mount device (/dev/root),
> then it goes to panic as root device not found but there is no check/log
> present in case of failure, So i have added the log in case it fails to create
> the root device. It will help in debugging.
>
> Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
> ---
> init/do_mounts.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/init/do_mounts.c b/init/do_mounts.c
> index 8369ffa..a68aaf6 100644
> --- a/init/do_mounts.c
> +++ b/init/do_mounts.c
> @@ -532,7 +532,8 @@ void __init mount_root(void)
> }
> #endif
> #ifdef CONFIG_BLOCK
> - create_dev("/dev/root", ROOT_DEV);
> + if(create_dev("/dev/root", ROOT_DEV) < 0)
> + printk(KERN_ERR "Failed to create %s device !!\n", "/dev/root");
No change, AFAICT. Please fix stuff I pointed in the email, and you
can get my acked-by ;-).
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCHv2] init/do_mounts: Add create_dev() failure log
2015-05-25 5:17 ` [PATCH] init/do_mounts: Add create_dev() failure log Vishnu Pratap Singh
2015-05-25 12:59 ` Pavel Machek
2015-05-25 13:49 ` Vishnu Pratap Singh
@ 2015-05-26 6:26 ` Vishnu Pratap Singh
2015-05-26 8:32 ` Pavel Machek
2015-05-27 23:27 ` Andrew Morton
2 siblings, 2 replies; 7+ messages in thread
From: Vishnu Pratap Singh @ 2015-05-26 6:26 UTC (permalink / raw)
To: paul.gortmaker, snitzer, dehrenberg, pavel, akpm, mszeredi, linux-kernel
Cc: cpgs, Vishnu Pratap Singh
if create_dev() function fails to create the root mount device (/dev/root),
then it goes to panic as root device not found but there is no check/log
present in case of failure, So i have added the log in case it fails to
create the root device. It will help in debugging.
Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
---
As per the review comment.
init/do_mounts.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 8369ffa..f742250 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -532,7 +532,8 @@ void __init mount_root(void)
}
#endif
#ifdef CONFIG_BLOCK
- create_dev("/dev/root", ROOT_DEV);
+ if (create_dev("/dev/root", ROOT_DEV) < 0)
+ pr_err("Failed to create %s device !\n", "/dev/root");
mount_block_root("/dev/root", root_mountflags);
#endif
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCHv2] init/do_mounts: Add create_dev() failure log
2015-05-26 6:26 ` [PATCHv2] " Vishnu Pratap Singh
@ 2015-05-26 8:32 ` Pavel Machek
2015-05-27 23:27 ` Andrew Morton
1 sibling, 0 replies; 7+ messages in thread
From: Pavel Machek @ 2015-05-26 8:32 UTC (permalink / raw)
To: Vishnu Pratap Singh
Cc: paul.gortmaker, snitzer, dehrenberg, akpm, mszeredi, linux-kernel, cpgs
On Tue 2015-05-26 11:56:58, Vishnu Pratap Singh wrote:
> if create_dev() function fails to create the root mount device (/dev/root),
> then it goes to panic as root device not found but there is no check/log
> present in case of failure, So i have added the log in case it fails to
> create the root device. It will help in debugging.
>
> Signed-off-by: Vishnu Pratap Singh <vishnu.ps@samsung.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
> ---
> As per the review comment.
>
> init/do_mounts.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/init/do_mounts.c b/init/do_mounts.c
> index 8369ffa..f742250 100644
> --- a/init/do_mounts.c
> +++ b/init/do_mounts.c
> @@ -532,7 +532,8 @@ void __init mount_root(void)
> }
> #endif
> #ifdef CONFIG_BLOCK
> - create_dev("/dev/root", ROOT_DEV);
> + if (create_dev("/dev/root", ROOT_DEV) < 0)
> + pr_err("Failed to create %s device !\n", "/dev/root");
> mount_block_root("/dev/root", root_mountflags);
> #endif
> }
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCHv2] init/do_mounts: Add create_dev() failure log
2015-05-26 6:26 ` [PATCHv2] " Vishnu Pratap Singh
2015-05-26 8:32 ` Pavel Machek
@ 2015-05-27 23:27 ` Andrew Morton
1 sibling, 0 replies; 7+ messages in thread
From: Andrew Morton @ 2015-05-27 23:27 UTC (permalink / raw)
To: Vishnu Pratap Singh
Cc: paul.gortmaker, snitzer, dehrenberg, pavel, mszeredi, linux-kernel, cpgs
On Tue, 26 May 2015 11:56:58 +0530 Vishnu Pratap Singh <vishnu.ps@samsung.com> wrote:
> if create_dev() function fails to create the root mount device (/dev/root),
> then it goes to panic as root device not found but there is no check/log
> present in case of failure, So i have added the log in case it fails to
> create the root device. It will help in debugging.
>
> ...
>
> --- a/init/do_mounts.c
> +++ b/init/do_mounts.c
> @@ -532,7 +532,8 @@ void __init mount_root(void)
> }
> #endif
> #ifdef CONFIG_BLOCK
> - create_dev("/dev/root", ROOT_DEV);
> + if (create_dev("/dev/root", ROOT_DEV) < 0)
> + pr_err("Failed to create %s device !\n", "/dev/root");
That's a pretty strange use of printk.
And KERN_EMERG seems more appropriate when this happens.
And we may as well let the poor user know why the mknod failed.
This?
--- a/init/do_mounts.c~init-do_mounts-add-create_dev-failure-log-fix
+++ a/init/do_mounts.c
@@ -533,9 +533,13 @@ void __init mount_root(void)
}
#endif
#ifdef CONFIG_BLOCK
- if (create_dev("/dev/root", ROOT_DEV) < 0)
- pr_err("Failed to create %s device !\n", "/dev/root");
- mount_block_root("/dev/root", root_mountflags);
+ {
+ int err = create_dev("/dev/root", ROOT_DEV);
+
+ if (err < 0)
+ pr_emerg("Failed to create /dev/root: %d\n", err);
+ mount_block_root("/dev/root", root_mountflags);
+ }
#endif
}
_
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-05-27 23:27 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <130285@samsung.com>
2015-05-25 5:17 ` [PATCH] init/do_mounts: Add create_dev() failure log Vishnu Pratap Singh
2015-05-25 12:59 ` Pavel Machek
2015-05-25 13:49 ` Vishnu Pratap Singh
2015-05-26 6:25 ` Pavel Machek
2015-05-26 6:26 ` [PATCHv2] " Vishnu Pratap Singh
2015-05-26 8:32 ` Pavel Machek
2015-05-27 23:27 ` Andrew Morton
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