linux-kernel - Re: [PATCH] ipc/ipc_sysctl.c: Remove fallback for !CONFIG_PROC

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Message-ID: <87ilyv4awe.fsf@disp2133>
Date:   Mon, 20 Sep 2021 08:46:57 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Manfred Spraul <manfred@...orfullife.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Michal Clapinski <mclapinski@...gle.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Andrew Morton <akpm@...ux-foundation.org>, 1vier1@....de
Subject: Re: [PATCH] ipc/ipc_sysctl.c: Remove fallback for !CONFIG_PROC_SYSCTL

Manfred Spraul <manfred@...orfullife.com> writes:

> Compilation of ipc/ipc_sysctl.c is controlled by
> obj-$(CONFIG_SYSVIPC_SYSCTL)
> [see ipc/Makefile]
>
> And CONFIG_SYSVIPC_SYSCTL depends on SYSCTL
> [see init/Kconfig]
>
> An SYSCTL is selected by PROC_SYSCTL.
> [see fs/proc/Kconfig]
>
> Thus: #ifndef CONFIG_PROC_SYSCTL in ipc/ipc_sysctl.c is impossible, the
> fallback can be removed.

Reviewed-by: "Eric W. Biederman" <ebiederm@...ssion.com>

Eric


> Signed-off-by: Manfred Spraul <manfred@...orfullife.com>
> ---
>  ipc/ipc_sysctl.c | 13 -------------
>  1 file changed, 13 deletions(-)
>
> diff --git a/ipc/ipc_sysctl.c b/ipc/ipc_sysctl.c
> index 345e4d673e61..f101c171753f 100644
> --- a/ipc/ipc_sysctl.c
> +++ b/ipc/ipc_sysctl.c
> @@ -23,7 +23,6 @@ static void *get_ipc(struct ctl_table *table)
>  	return which;
>  }
>  
> -#ifdef CONFIG_PROC_SYSCTL
>  static int proc_ipc_dointvec(struct ctl_table *table, int write,
>  		void *buffer, size_t *lenp, loff_t *ppos)
>  {
> @@ -118,18 +117,6 @@ static int proc_ipc_dointvec_minmax_checkpoint_restore(struct ctl_table *table,
>  }
>  #endif
>  
> -#else
> -#define proc_ipc_doulongvec_minmax NULL
> -#define proc_ipc_dointvec	   NULL
> -#define proc_ipc_dointvec_minmax   NULL
> -#define proc_ipc_dointvec_minmax_orphans   NULL
> -#define proc_ipc_auto_msgmni	   NULL
> -#define proc_ipc_sem_dointvec	   NULL
> -#ifdef CONFIG_CHECKPOINT_RESTORE
> -#define proc_ipc_dointvec_minmax_checkpoint_restore	NULL
> -#endif	/* CONFIG_CHECKPOINT_RESTORE */
> -#endif
> -
>  int ipc_mni = IPCMNI;
>  int ipc_mni_shift = IPCMNI_SHIFT;
>  int ipc_min_cycle = RADIX_TREE_MAP_SIZE;