Re: [PATCH] zram: Remove KMSG_COMPONENT macro
From: Sergey Senozhatsky
Date: Wed Nov 26 2025 - 20:50:42 EST
Adding Andrew (message id: 20251126143602.2207435-1-hca@xxxxxxxxxxxxx)
On (25/11/26 15:36), Heiko Carstens wrote:
> The KMSG_COMPONENT macro is a leftover of the s390 specific "kernel message
> catalog" from 2008 [1] which never made it upstream.
>
> The macro was added to s390 code to allow for an out-of-tree patch which
> used this to generate unique message ids. Also this out-of-tree doesn't
> exist anymore.
>
> The pattern of how the KMSG_COMPONENT is used was partially also used for
> non s390 specific code, for whatever reasons.
>
> Remove the macro in order to get rid of a pointless indirection.
>
> [1] https://lwn.net/Articles/292650/
>
> Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
Reviewed-by: Sergey Senozhatsky Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
> ---
> drivers/block/zram/zram_drv.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
> index a43074657531..4ea0d435a24e 100644
> --- a/drivers/block/zram/zram_drv.c
> +++ b/drivers/block/zram/zram_drv.c
> @@ -12,8 +12,7 @@
> *
> */
>
> -#define KMSG_COMPONENT "zram"
> -#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
> +#define pr_fmt(fmt) "zram: " fmt
>
> #include <linux/module.h>
> #include <linux/kernel.h>
> --
> 2.51.0
>