From: Julia Lawall <julia.lawall@lip6.fr>
To: Colin Ian King <colin.king@canonical.com>
Cc: Joe Perches <joe@perches.com>,
Stanislaw Gruszka <sgruszka@redhat.com>,
Kalle Valo <kvalo@codeaurora.org>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] wireless: iwlegacy: make const array static to shink object code size Content-Type: text
Date: Fri, 22 Sep 2017 10:06:20 +0000 [thread overview]
Message-ID: <alpine.DEB.2.20.1709221206050.3170@hadrien> (raw)
In-Reply-To: <f6cb5b73-4ed5-92d9-3909-32b8e3aafc45@canonical.com>
On Fri, 22 Sep 2017, Colin Ian King wrote:
> On 22/09/17 11:03, Joe Perches wrote:
> > On Fri, 2017-09-22 at 09:23 +0200, Julia Lawall wrote:
> >>
> >> On Thu, 21 Sep 2017, Colin King wrote:
> >>
> >>> From: Colin Ian King <colin.king@canonical.com>
> >>>
> >>> Don't populate const array ac_to_fifo on the stack in an inlined
> >>> function, instead make it static. Makes the object code smaller
> >>> by over 800 bytes:
> >>>
> >>> text data bss dec hex filename
> >>> 159029 33154 1216 193399 2f377 4965-mac.o
> >>>
> >>> text data bss dec hex filename
> >>> 158122 33250 1216 192588 2f04c 4965-mac.o
> >>>
> >>> (gcc version 7.2.0 x86_64)
> >>
> >> Gcc 7 must be much more aggressive about inlining than gcc 4. Here is the
> >> change that I got on this file:
> >>
> >> text data bss dec hex filename
> >> - 76346 1494 152 77992 130a8 drivers/net/wireless/intel/iwlegacy/4965-mac.o
> >> + 76298 1494 152 77944 13078 drivers/net/wireless/intel/iwlegacy/4965-mac.o
> >> decrease of 48
> >
> > More likely different CONFIG options.
> >
> > e.g. allyesconfig vs defconfig with wireless
> >
> yup, I used allyesconfig
Mine is also allyesconfig.
julia
>
> --
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next prev parent reply other threads:[~2017-09-22 10:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-21 22:56 [PATCH] wireless: iwlegacy: make const array static to shink object code size Content-Type: text/pl Colin King
2017-09-22 6:00 ` [PATCH] wireless: iwlegacy: make const array static to shink object code size Content-Type: tex Johannes Berg
2017-09-22 7:23 ` [PATCH] wireless: iwlegacy: make const array static to shink object code size Content-Type: text Julia Lawall
2017-09-22 10:03 ` Joe Perches
2017-09-22 10:05 ` Colin Ian King
2017-09-22 10:06 ` Julia Lawall [this message]
2017-09-22 10:46 ` Joe Perches
2017-09-22 10:54 ` Julia Lawall
2017-09-22 9:56 ` [PATCH] wireless: iwlegacy: make const array static to shink object code size Content-Type: tex Stanislaw Gruszka
2017-09-22 10:32 ` Kalle Valo
2017-09-25 8:29 ` iwlegacy: make const array static to shink object code size Kalle Valo
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