Revert "scripts/common: fix write_file when opened with mmap"

mmap() is no longer used in read_file_2(), so this patch is no longer
necessary.

This reverts commit 738601e1258c55953284ee10801b26b9977918c2.

Link: https://lore.barebox.org/20220211094230.1807262-3-s.hauer@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 4 insertions, 11 deletions

diff --git a/scripts/common.c b/scripts/common.c
index 3d07be3630..2be41615ea 100644
--- a/scripts/common.c
+++ b/scripts/common.c
@@ -102,33 +102,26 @@ int write_file(const char *filename, const void *buf, size_t size)
 {
 	int fd, ret = 0;
 	int now;
-	size_t left = size;
 
-	/* The same file may be mmapped currently, so can't use O_TRUNC here */
-	fd = open(filename, O_WRONLY | O_CREAT,
+	fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT,
 		  S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 	if (fd < 0) {
 		fprintf(stderr, "Cannot open %s: %s\n", filename, strerror(errno));
 		return -errno;
 	}
 
-	while (left) {
-		now = write(fd, buf, left);
+	while (size) {
+		now = write(fd, buf, size);
 		if (now < 0) {
 			fprintf(stderr, "Cannot write to %s: %s\n", filename,
 				strerror(errno));
 			ret = -errno;
 			goto out;
 		}
-		left -= now;
+		size -= now;
 		buf += now;
 	}
 
-	if (ftruncate(fd, size) < 0) {
-		fprintf(stderr, "Cannot truncate file: %s", strerror(errno));
-		ret = -errno;
-	}
-
 out:
 	close(fd);