From: Ben Hutchings <bhutchings@solarflare.com>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Subject: Re: sfc: an enumeration is not a bitmask
Date: Tue, 17 May 2011 19:18:39 +0100 [thread overview]
Message-ID: <1305656319.2848.28.camel@bwh-desktop> (raw)
In-Reply-To: <20110517.141446.140687548350861625.davem@davemloft.net>
On Tue, 2011-05-17 at 14:14 -0400, David Miller wrote:
> Ben can you please get rid of "enum efx_fc_type"?
>
> drivers/net/sfc/mcdi_mac.c: In function ‘efx_mcdi_set_mac’:
> drivers/net/sfc/mcdi_mac.c:36:2: warning: case value ‘3’ not in enumerated type ‘enum efx_fc_type’
>
> An enumeration is not a bitmask, instead it means one out of the set
> of enumerated values will be used. This means that the warning
> here about:
>
> switch (efx->wanted_fc) {
> case EFX_FC_RX | EFX_FC_TX:
>
> is completely legitimate.
I think this is common practice in C. I filed a bug regarding the
warning at <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46457>, which
has not yet been resolved either way.
Ben.
--
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
next prev parent reply other threads:[~2011-05-17 18:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 18:14 sfc: an enumeration is not a bitmask David Miller
2011-05-17 18:18 ` Ben Hutchings [this message]
2011-05-17 18:23 ` David Miller
2011-05-17 18:48 ` [PATCH net-next-2.6] sfc: Suppress warning about combining enum flags by gcc 4.5 Ben Hutchings
2011-05-17 19:26 ` David Miller
2011-05-17 21:06 ` [PATCH net-next-2.6] sfc: Replace enum efx_fc_type with a 'bitwise' type Ben Hutchings
2011-05-17 21:14 ` David Miller
2011-05-17 21:22 ` Joe Perches
2011-05-17 21:28 ` David Miller
2011-05-17 21:30 ` Michał Mirosław
2011-05-17 21:36 ` Eric Dumazet
2011-05-17 21:43 ` Joe Perches
2011-05-17 21:43 ` [PATCH net-next-2.6] sfc: Replace enum efx_fc_type with macros and type alias Ben Hutchings
2011-05-17 21:45 ` David Miller
2011-05-18 2:01 ` [PATCH net-next-2.6] sfc: Replace enum efx_fc_type with a 'bitwise' type Jeff Garzik
2011-05-18 2:23 ` David Miller
2011-05-18 2:59 ` Jeff Garzik
2011-05-17 18:57 ` sfc: an enumeration is not a bitmask Jeff Garzik
2011-05-17 19:09 ` Michał Mirosław
2011-05-17 19:22 ` Ben Hutchings
2011-05-17 22:00 ` Jeff Garzik
2011-05-17 23:19 ` Michał Mirosław
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