[tip: x86/vdso] x86/vdso/vdso2c: Correct error messages on file open

[tip-bot2 for Dmitry Safonov]

The following commit has been merged into the x86/vdso branch of tip:

Commit-ID:     089ef5579fc1b0b748bfb1600b4392f42db6fd5f
Gitweb:        https://git.kernel.org/tip/089ef5579fc1b0b748bfb1600b4392f42db6fd5f
Author:        Dmitry Safonov <dima@xxxxxxxxxx>
AuthorDate:    Mon, 20 Apr 2020 19:32:53 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Tue, 21 Apr 2020 20:33:16 +02:00

x86/vdso/vdso2c: Correct error messages on file open

err() message in main() is misleading: it should print `outfilename`,
which is argv[3], not argv[2].

Correct error messages to be more precise about what failed and for
which file.

Co-developed-by: Andrei Vagin <avagin@xxxxxxxxxx>
Signed-off-by: Andrei Vagin <avagin@xxxxxxxxxx>
Signed-off-by: Dmitry Safonov <dima@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200420183256.660371-2-dima@xxxxxxxxxx

---
 arch/x86/entry/vdso/vdso2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/entry/vdso/vdso2c.c b/arch/x86/entry/vdso/vdso2c.c
index 3842873..7380908 100644
--- a/arch/x86/entry/vdso/vdso2c.c
+++ b/arch/x86/entry/vdso/vdso2c.c
@@ -187,7 +187,7 @@ static void map_input(const char *name, void **addr, size_t *len, int prot)
 
 	int fd = open(name, O_RDONLY);
 	if (fd == -1)
-		err(1, "%s", name);
+		err(1, "open(%s)", name);
 
 	tmp_len = lseek(fd, 0, SEEK_END);
 	if (tmp_len == (off_t)-1)
@@ -240,7 +240,7 @@ int main(int argc, char **argv)
 	outfilename = argv[3];
 	outfile = fopen(outfilename, "w");
 	if (!outfile)
-		err(1, "%s", argv[2]);
+		err(1, "fopen(%s)", outfilename);
 
 	go(raw_addr, raw_len, stripped_addr, stripped_len, outfile, name);