[PATCH] x86/vdso: Use proper modifier for len's printf in extract

From: Jiri Slaby <jslaby@suse.cz>
To: bp@alien8.de
Cc: linux-kernel@vger.kernel.org, Jiri Slaby <jslaby@suse.cz>,
	Andy Lutomirski <luto@amacapital.net>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Jarkko Sakkinen <jarkko@kernel.org>, Borislav Petkov <bp@suse.de>,
	Jethro Beekman <jethro@fortanix.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org
Subject: [PATCH] x86/vdso: Use proper modifier for len's printf in extract
Date: Wed,  3 Mar 2021 07:43:57 +0100	[thread overview]
Message-ID: <20210303064357.17056-1-jslaby@suse.cz> (raw)

Commit 8382c668ce4f ("x86/vdso: Add support for exception fixup in vDSO
functions") added a printf of len which is size_t. Compilers now
complain on 32b:
In file included from arch/x86/entry/vdso/vdso2c.c:162:
arch/x86/entry/vdso/vdso2c.h: In function 'extract64':
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'}

So use proper modifier (%zu) for size_t.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Fixes: 8382c668ce4f ("x86/vdso: Add support for exception fixup in vDSO functions")
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jethro Beekman <jethro@fortanix.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
---
 arch/x86/entry/vdso/vdso2c.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/vdso/vdso2c.h b/arch/x86/entry/vdso/vdso2c.h
index 1c7cfac7e64a..5264daa8859f 100644
--- a/arch/x86/entry/vdso/vdso2c.h
+++ b/arch/x86/entry/vdso/vdso2c.h
@@ -35,7 +35,7 @@ static void BITSFUNC(extract)(const unsigned char *data, size_t data_len,
 	if (offset + len > data_len)
 		fail("section to extract overruns input data");
 
-	fprintf(outfile, "static const unsigned char %s[%lu] = {", name, len);
+	fprintf(outfile, "static const unsigned char %s[%zu] = {", name, len);
 	BITSFUNC(copy)(outfile, data + offset, len);
 	fprintf(outfile, "\n};\n\n");
 }
-- 
2.30.1

