Re: md: dm-ioctl: drop always-false condition

[Mike Snitzer]

On Mon, Feb 06 2023 at  3:58P -0500,
Sergey Shtylyov <s.shtylyov@xxxxxx> wrote:

> On 1/18/23 2:59 PM, Mikulas Patocka wrote:
> 
> [...]
> 
> >> The expression 'indata[3] > ULONG_MAX' always evaluates to false since
> >> indata[] is declared as an array of *unsigned long* elements and #define
> >> ULONG_MAX represents the max value of that exact type...
> >>
> >> Note that gcc seems to be able to detect the dead code here and eliminate
> >> this check anyway...
> >>
> >> Found by Linux Verification Center (linuxtesting.org) with the SVACE static
> >> analysis tool.
> >>
> >> Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
> > 
> > Reviewed-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
> 
>    Thank you!
> 
> >> ---
> >> This patch is atop of the 'for-next' branch of the device-mapper repo...
> >>
> >>  drivers/md/dm-ioctl.c |    3 +--
> >>  1 file changed, 1 insertion(+), 2 deletions(-)
> >>
> >> Index: linux-dm/drivers/md/dm-ioctl.c
> >> ===================================================================
> >> --- linux-dm.orig/drivers/md/dm-ioctl.c
> >> +++ linux-dm/drivers/md/dm-ioctl.c
> >> @@ -1073,8 +1073,7 @@ static int dev_set_geometry(struct file
> 
>    Returning to this patch, I think I should've added the name of the function
> in question in both the subject and and commit msg... I'll recast...

Not a big deal, I've already staged it so please don't resend.

See:
https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-6.3&id=151d812251202aa0dce1fdeabd64794292d40b75