linux-kernel - RE: [PATCH RESEND] firmware: iSCSI: Remove unneeded #ifdef and associated dead code

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Date:	Mon, 13 Apr 2015 00:39:15 +0000
From:	"Zheng, Lv" <lv.zheng@...el.com>
To:	Andreas Ruprecht <andreas.ruprecht@....de>,
	Peter Jones <pjones@...hat.com>
CC:	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH RESEND] firmware: iSCSI: Remove unneeded #ifdef and
 associated dead code

Hi,

Thanks for noticing this.

> From: Andreas Ruprecht [mailto:andreas.ruprecht@....de]
> Sent: Sunday, April 12, 2015 8:19 PM
> 
> In commit 9d24622ced32 ("ACPI / IBFT: Fix incorrect <acpi/acpi.h>
> inclusion in iSCSI boot firmware module"), the dependencies for
> CONFIG_ISCSI_IBFT_FIND were changed to also include CONFIG_ACPI.
> 
> Inside drivers/firmware/iscsi_ibft.c, there is an "#ifdef CONFIG_ACPI"
> block, while the whole file is only compiled with CONFIG_ISCSI_IBFT
> enabled. As CONFIG_ISCSI_IBFT depends on CONFIG_ISCSI_IBFT_FIND
> (which in turn depends on CONFIG_ACPI), CONFIG_ACPI will always be
> enabled when we compile the file, hence the #ifdef is unnecessary and
> the (empty) function inside the #else block can never be compiled and
> they can both be removed.
> 
> Signed-off-by: Andreas Ruprecht <andreas.ruprecht@....de>

Acked-by: Lv Zheng <lv.zheng@...el.com>

Best regards
-Lv

> ---
>  drivers/firmware/iscsi_ibft.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
> index 071c2c9..60c937f 100644
> --- a/drivers/firmware/iscsi_ibft.c
> +++ b/drivers/firmware/iscsi_ibft.c
> @@ -746,7 +746,6 @@ static void __exit ibft_exit(void)
>  	ibft_cleanup();
>  }
> 
> -#ifdef CONFIG_ACPI
>  static const struct {
>  	char *sign;
>  } ibft_signs[] = {
> @@ -772,11 +771,6 @@ static void __init acpi_find_ibft_region(void)
>  		ibft_addr = (struct acpi_table_ibft *)table;
>  	}
>  }
> -#else
> -static void __init acpi_find_ibft_region(void)
> -{
> -}
> -#endif
> 
>  /*
>   * ibft_init() - creates sysfs tree entries for the iBFT data.
> --
> 1.9.1

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