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

Jiri Slaby
2021-03-03T12:58:05Z

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