diff --git a/cache.h b/cache.h
index 6f1c21a352..f440d3fd1e 100644
--- a/cache.h
+++ b/cache.h
@@ -1123,7 +1123,7 @@ extern int hash_sha1_file_literally(const void *buf, unsigned long len, const ch
 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 extern int git_open_cloexec(const char *name, int flags);
-extern int git_open(const char *name);
+#define git_open(name) git_open_cloexec(name, O_RDONLY)
 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
diff --git a/sha1_file.c b/sha1_file.c
index 64e1a21fc6..4e062edea0 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -27,14 +27,6 @@
 #include "list.h"
 #include "mergesort.h"
 
-#ifndef O_NOATIME
-#if defined(__linux__) && (defined(__i386__) || defined(__PPC__))
-#define O_NOATIME 01000000
-#else
-#define O_NOATIME 0
-#endif
-#endif
-
 #define SZ_FMT PRIuMAX
 static inline uintmax_t sz_fmt(size_t s) { return s; }
 
@@ -1586,19 +1578,6 @@ int git_open_cloexec(const char *name, int flags)
 	return fd;
 }
 
-int git_open(const char *name)
-{
-	static int noatime = O_NOATIME;
-	int fd = git_open_cloexec(name, O_RDONLY);
-
-	if (0 <= fd && (noatime & O_NOATIME)) {
-		int flags = fcntl(fd, F_GETFL);
-		if (fcntl(fd, F_SETFL, flags | noatime))
-			noatime = 0;
-	}
-	return fd;
-}
-
 static int stat_sha1_file(const unsigned char *sha1, struct stat *st)
 {
 	struct alternate_object_database *alt;