From: Dave Jiang <dave.jiang@intel.com>
To: Arnd Bergmann <arnd@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>, "H. Peter Anvin" <hpa@zytor.com>,
Tony Luck <tony.luck@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Ben Widawsky <ben.widawsky@intel.com>,
Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
Arvind Sankar <nivedita@alum.mit.edu>,
Peter Zijlstra <peterz@infradead.org>,
Vinod Koul <vkoul@kernel.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86/asm: fix gcc-5 enqcmds() build failure
Date: Mon, 2 Aug 2021 08:22:46 -0700 [thread overview]
Message-ID: <196808b0-fa78-eab4-d68b-45bded788f86@intel.com> (raw)
In-Reply-To: <20210802145356.1154321-1-arnd@kernel.org>
On 8/2/2021 7:53 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> Building drivers/dma/idxd/submit.o with gcc-5.5 results in a cryptic
> error messages:
>
> arch/x86/include/asm/special_insns.h: Assembler messages:
> arch/x86/include/asm/special_insns.h:286: Error: operand size mismatch for `setz'
> make[5]: *** [scripts/Makefile.build:272: drivers/dma/idxd/submit.o] Error 1
>
> It seems that this happens for 32-bit arguments when the instruction
> expects an 8-bit argument. Change the type of the local variable
> accordingly to get a clean build.
>
> Fixes: 7f5933f81bd8 ("x86/asm: Add an enqcmds() wrapper for the ENQCMDS instruction")
> Fixes: 8e50d392652f ("dmaengine: idxd: Add shared workqueue support") # guessed
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Thanks!
> ---
> arch/x86/include/asm/special_insns.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h
> index f3fbb84ff8a7..33264839f99e 100644
> --- a/arch/x86/include/asm/special_insns.h
> +++ b/arch/x86/include/asm/special_insns.h
> @@ -275,7 +275,7 @@ static inline int enqcmds(void __iomem *dst, const void *src)
> {
> const struct { char _[64]; } *__src = src;
> struct { char _[64]; } __iomem *__dst = dst;
> - int zf;
> + u8 zf;
>
> /*
> * ENQCMDS %(rdx), rax
next prev parent reply other threads:[~2021-08-02 15:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-02 14:53 [PATCH] x86/asm: fix gcc-5 enqcmds() build failure Arnd Bergmann
2021-08-02 15:22 ` Dave Jiang [this message]
2021-08-02 16:15 ` H. Peter Anvin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=196808b0-fa78-eab4-d68b-45bded788f86@intel.com \
--to=dave.jiang@intel.com \
--cc=arnd@arndb.de \
--cc=arnd@kernel.org \
--cc=ben.widawsky@intel.com \
--cc=bp@alien8.de \
--cc=dan.j.williams@intel.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=nivedita@alum.mit.edu \
--cc=peterz@infradead.org \
--cc=ricardo.neri-calderon@linux.intel.com \
--cc=tglx@linutronix.de \
--cc=tony.luck@intel.com \
--cc=vkoul@kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).