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Date:   Mon, 25 Jan 2021 19:14:08 +0200
From:   Jarkko Sakkinen <jarkko@kernel.org>
To:     Mikulas Patocka <mpatocka@redhat.com>
Cc:     Sean Christopherson <sean.j.christopherson@intel.com>,
        Andy Lutomirski <luto@amacapital.net>,
        Borislav Petkov <bp@suse.de>,
        Jethro Beekman <jethro@fortanix.com>, x86@kernel.org,
        linux-sgx@vger.kernel.org
Subject: Re: [PATCH] x86/vdso: fix a warning with x32 compiler
Message-ID: <YA78YPVWsE6WNHhd@kernel.org>
References: <alpine.LRH.2.02.2101230548050.21951@file01.intranet.prod.int.rdu2.redhat.com>
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On Sat, Jan 23, 2021 at 05:50:31AM -0500, Mikulas Patocka wrote:
> This patch fixes a warning:
> arch/x86/entry/vdso/vdso2c.h:38:52: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘size_t’ {aka ‘unsigned int’} [-Wformat=]
> when compiling the kernel with x32 compiler.
> 
> The reason for the warning is that in x32 mode, size_t is defined as
> unsigned, not unsigned long.
> 
> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
> Fixes: 8382c668ce4f ("x86/vdso: Add support for exception fixup in vDSO functions")

So... Why not %zu?

/Jarkko