[Bug 219192] drivers/iio/imu/adis16400.o: warning: objtool: adis16400_write_raw() falls through to next function adis16400_show_flash_count()

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219192

--- Comment #1 from Jonathan Cameron (jic23@kernel.org) ---
On Sun, 25 Aug 2024 09:35:37 +0000
bugzilla-daemon@kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=219192
> 
>             Bug ID: 219192
>            Summary: drivers/iio/imu/adis16400.o: warning: objtool:
>                     adis16400_write_raw() falls through to next function
>                     adis16400_show_flash_count()
>            Product: Drivers
>            Version: 2.5
>           Hardware: All
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P3
>          Component: IIO
>           Assignee: drivers_iio@kernel-bugs.kernel.org
>           Reporter: ionut_n2001@yahoo.com
>         Regression: No
> 
> drivers/iio/imu/adis16400.o: warning: objtool: adis16400_write_raw() falls
> through to next function adis16400_show_flash_count()
> 
> Kernel: 6.11.0-rc5 vanilla
> GCC compiler: gcc (Debian 14.1.0-5) 14.1.0

I think this is a false positive.  None of the cases of the switch statement
fail to return and there are unreachable() markings that this
check seems to not be able to see which were added to try and
point out to the compiler that it was failing to identify they
were not possible to get to.

We could add some returns the unreachable paths to work around
this warning I suppose.

Maybe we are doing something wrong otherwise?  I'd like more
eyes on this incase I'm just missing something obvious.

Jonathan


>

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