[PATCH] crash_dump: fix boolreturn.cocci warning

[Simon Horman]

On Wed, Oct 20, 2021 at 08:39:05AM +0000, cgel.zte at gmail.com wrote:
> From: Changcheng Deng <deng.changcheng at zte.com.cn>
> 
> ./include/linux/crash_dump.h: 119: 50-51: WARNING: return of 0/1 in
> function 'is_kdump_kernel' with return type bool
> 
> Return statements in functions returning bool should use true/false
> instead of 1/0.
> 
> Reported-by: Zeal Robot <zealci at zte.com.cn>
> Signed-off-by: Changcheng Deng <deng.changcheng at zte.com.cn>

Reviewed-by: Simon Horman <horms at kernel.org>