linux-kernel - Re: [PATCH 1/2] scsi: lpfc: avoid harmless comparison warning

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Message-ID: <yq1lh14lxkt.fsf@sermon.lab.mkp.net>
Date:	Wed, 13 Jul 2016 23:15:14 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	"James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	James Smart <james.smart@...adcom.com>,
	Dick Kennedy <dick.kennedy@...adcom.com>,
	Hannes Reinicke <hare@...e.de>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] scsi: lpfc: avoid harmless comparison warning

>>>>> "Arnd" == Arnd Bergmann <arnd@...db.de> writes:

Arnd> When building with -Wextra, we get a lot of warnings for the lpfc
Arnd> driver concerning expressions that are always true, starting with:

Arnd> drivers/scsi/lpfc/lpfc_attr.c: In function
Arnd> 'lpfc_enable_npiv_init': drivers/scsi/lpfc/lpfc_attr.c:2786:77:
Arnd> error: comparison of unsigned expression >= 0 is always true
Arnd> [-Werror=type-limits] drivers/scsi/lpfc/lpfc_attr.c: In function
Arnd> 'lpfc_enable_rrq_init': drivers/scsi/lpfc/lpfc_attr.c:2802:76:
Arnd> error: comparison of unsigned expression >= 0 is always true
Arnd> [-Werror=type-limits] drivers/scsi/lpfc/lpfc_attr.c: In function
Arnd> 'lpfc_suppress_link_up_init':
Arnd> drivers/scsi/lpfc/lpfc_attr.c:2812:2050: error: comparison of
Arnd> unsigned expression >= 0 is always true [-Werror=type-limits]
Arnd> drivers/scsi/lpfc/lpfc_attr.c: In function
Arnd> 'lpfc_log_verbose_init': drivers/scsi/lpfc/lpfc_attr.c:3064:1930:
Arnd> error: comparison of unsigned expression >= 0 is always true
Arnd> [-Werror=type-limits]

James, Dick: Please review!

-- 
Martin K. Petersen	Oracle Linux Engineering