linux-kernel - Re: [PATCH 2/3] staging: r8188eu: Makefile: don't overwrite global settings

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Message-ID: <YW2KGZ6+ZdQzwQu4@kroah.com>
Date:   Mon, 18 Oct 2021 16:52:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Michael Straube <straube.linux@...il.com>
Cc:     Martin Kaiser <martin@...ser.cx>,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] staging: r8188eu: Makefile: don't overwrite global
 settings

On Sun, Oct 17, 2021 at 10:46:11PM +0200, Michael Straube wrote:
> On 10/17/21 19:46, Martin Kaiser wrote:
> > Thus wrote Michael Straube (straube.linux@...il.com):
> > 
> > > On 10/16/21 19:35, Martin Kaiser wrote:
> > > > Remove settings from the Makefile that are set by higher-level Makefiles.
> > 
> > > > Some of those settings might have been useful when the driver was
> > > > maintained out of tree.
> > 
> > > > Signed-off-by: Martin Kaiser <martin@...ser.cx>
> > > > ---
> > > >    drivers/staging/r8188eu/Makefile | 14 --------------
> > > >    1 file changed, 14 deletions(-)
> > 
> > > > diff --git a/drivers/staging/r8188eu/Makefile b/drivers/staging/r8188eu/Makefile
> > > > index fccf7e6d1520..8294fb69ecf9 100644
> > > > --- a/drivers/staging/r8188eu/Makefile
> > > > +++ b/drivers/staging/r8188eu/Makefile
> > > > @@ -1,8 +1,3 @@
> > > > -SHELL := /bin/bash
> > > > -EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)
> > > > -EXTRA_CFLAGS += -O1
> > > > -
> > > > -ccflags-y += -D__CHECK_ENDIAN__
> > > >    OUTSRC_FILES :=				\
> > > >    		hal/HalHWImg8188E_MAC.o	\
> > > > @@ -46,15 +41,6 @@ _OS_INTFS_FILES :=				\
> > > >    _HAL_INTFS_FILES += $(OUTSRC_FILES)
> > > > -SUBARCH := $(shell uname -m | sed -e "s/i.86/i386/; s/ppc.*/powerpc/; s/armv.l/arm/; s/aarch64/arm64/;")
> > > > -
> > > > -ARCH ?= $(SUBARCH)
> > > > -CROSS_COMPILE ?=
> > > > -KVER  ?= $(if $(KERNELRELEASE),$(KERNELRELEASE),$(shell uname -r))
> > > > -KSRC ?= $(if $(KERNEL_SRC),$(KERNEL_SRC),/lib/modules/$(KVER)/build)
> > > > -MODDESTDIR := /lib/modules/$(KVER)/kernel/drivers/net/wireless
> > > > -INSTALL_PREFIX :=
> > > > -
> > > >    rtk_core :=				\
> > > >    		core/rtw_ap.o		\
> > > >    		core/rtw_br_ext.o	\
> > 
> > 
> > > Hi Martin, this patch introduces a GCC warning on my system.
> > 
> > > drivers/staging/r8188eu/os_dep/ioctl_linux.c: In function
> > > 'rtw_wx_set_enc_ext':
> > > drivers/staging/r8188eu/os_dep/ioctl_linux.c:1929:9: warning: 'strncpy'
> > > specified bound 16 equals destination size [-Wstringop-truncation]
> > >   1929 |         strncpy((char *)param->u.crypt.alg, alg_name,
> > > IEEE_CRYPT_ALG_NAME_LEN);
> > >        |
> > 
> > 
> > Hi Michael,
> > 
> > thanks for reporting this. So far, I can't reproduce the warning, even
> > if I enable -Wstringop-truncation explicitly. I tried this with gcc
> > 8.3.0 (Debian buster) on x86_64.
> 
> Hi Martin,
> 
> probably only newer gcc versions produce this warning. On my system
> the gcc version is 11.2.1 (openSUSE Tumbleweed).

I have gcc 11.1.0 here and I can not duplicate this warning.  And it
looks like the code matches other places in the kernel where this
happens, so I'll just take this for now and see if someone wants to send
me a real fix for it, as it is independent of this Makefile change.

thanks,

greg k-h