diff -ru git-2.25.1/commit-graph.c git-2.25.1-serenity/commit-graph.c
--- git-2.25.1/commit-graph.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/commit-graph.c	2020-02-20 06:44:32.062023438 +0100
@@ -130,7 +130,7 @@
 		error(_("commit-graph file is too small"));
 		return NULL;
 	}
-	graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_SHARED, fd, 0);
 	ret = parse_commit_graph(graph_map, fd, graph_size);
 
 	if (!ret) {
diff -ru git-2.25.1/config.c git-2.25.1-serenity/config.c
--- git-2.25.1/config.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/config.c	2020-02-20 06:44:32.062023438 +0100
@@ -2841,7 +2841,7 @@
 
 		contents_sz = xsize_t(st.st_size);
 		contents = xmmap_gently(NULL, contents_sz, PROT_READ,
-					MAP_PRIVATE, in_fd, 0);
+					MAP_SHARED, in_fd, 0);
 		if (contents == MAP_FAILED) {
 			if (errno == ENODEV && S_ISDIR(st.st_mode))
 				errno = EISDIR;
diff -ru git-2.25.1/config.mak.uname git-2.25.1-serenity/config.mak.uname
--- git-2.25.1/config.mak.uname	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/config.mak.uname	2020-02-20 06:20:22.532687832 +0100
@@ -4,12 +4,12 @@
 # Microsoft's Safe Exception Handling in libraries (such as zlib).
 # Typically required for VS2013+/32-bit compilation on Vista+ versions.
 
-uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
-uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not')
-uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
-uname_R := $(shell sh -c 'uname -r 2>/dev/null || echo not')
-uname_P := $(shell sh -c 'uname -p 2>/dev/null || echo not')
-uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
+uname_S := 
+uname_M := 
+uname_O := 
+uname_R := 
+uname_P := 
+uname_V := 
 
 ifdef MSVC
 	# avoid the MingW and Cygwin configuration sections
diff -ru git-2.25.1/diff.c git-2.25.1-serenity/diff.c
--- git-2.25.1/diff.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/diff.c	2020-02-20 06:44:32.070023410 +0100
@@ -3994,7 +3994,7 @@
 		fd = open(s->path, O_RDONLY);
 		if (fd < 0)
 			goto err_empty;
-		s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
+		s->data = xmmap(NULL, s->size, PROT_READ, MAP_SHARED, fd, 0);
 		close(fd);
 		s->should_munmap = 1;
 
diff -ru git-2.25.1/midx.c git-2.25.1-serenity/midx.c
--- git-2.25.1/midx.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/midx.c	2020-02-20 06:44:32.082023367 +0100
@@ -71,7 +71,7 @@
 
 	FREE_AND_NULL(midx_name);
 
-	midx_map = xmmap(NULL, midx_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	midx_map = xmmap(NULL, midx_size, PROT_READ, MAP_SHARED, fd, 0);
 
 	FLEX_ALLOC_STR(m, object_dir, object_dir);
 	m->fd = fd;
diff -ru git-2.25.1/pack-bitmap.c git-2.25.1-serenity/pack-bitmap.c
--- git-2.25.1/pack-bitmap.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/pack-bitmap.c	2020-02-20 06:44:32.086023353 +0100
@@ -288,7 +288,7 @@
 
 	bitmap_git->pack = packfile;
 	bitmap_git->map_size = xsize_t(st.st_size);
-	bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_SHARED, fd, 0);
 	bitmap_git->map_pos = 0;
 	close(fd);
 
diff -ru git-2.25.1/packfile.c git-2.25.1-serenity/packfile.c
--- git-2.25.1/packfile.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/packfile.c	2020-02-20 06:44:32.086023353 +0100
@@ -97,7 +97,7 @@
 		close(fd);
 		return error("index file %s is too small", path);
 	}
-	idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_SHARED, fd, 0);
 	close(fd);
 
 	ret = load_idx(path, hashsz, idx_map, idx_size, p);
@@ -653,7 +653,7 @@
 				&& unuse_one_window(p))
 				; /* nothing */
 			win->base = xmmap_gently(NULL, win->len,
-				PROT_READ, MAP_PRIVATE,
+				PROT_READ, MAP_SHARED,
 				p->pack_fd, win->offset);
 			if (win->base == MAP_FAILED)
 				die_errno("packfile %s cannot be mapped",
diff -ru git-2.25.1/read-cache.c git-2.25.1-serenity/read-cache.c
--- git-2.25.1/read-cache.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/read-cache.c	2020-02-20 06:44:32.090023338 +0100
@@ -2177,7 +2177,7 @@
 	if (mmap_size < sizeof(struct cache_header) + the_hash_algo->rawsz)
 		die(_("%s: index file smaller than expected"), path);
 
-	mmap = xmmap_gently(NULL, mmap_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	mmap = xmmap_gently(NULL, mmap_size, PROT_READ, MAP_SHARED, fd, 0);
 	if (mmap == MAP_FAILED)
 		die_errno(_("%s: unable to map index file"), path);
 	close(fd);
diff -ru git-2.25.1/sha1-file.c git-2.25.1-serenity/sha1-file.c
--- git-2.25.1/sha1-file.c	2020-02-17 05:47:35.000000000 +0100
+++ git-2.25.1-serenity/sha1-file.c	2020-02-20 06:44:32.102023295 +0100
@@ -1129,7 +1129,7 @@
 				close(fd);
 				return NULL;
 			}
-			map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0);
+			map = xmmap(NULL, *size, PROT_READ, MAP_SHARED, fd, 0);
 		}
 		close(fd);
 	}
@@ -2073,7 +2073,7 @@
 			ret = index_mem(istate, oid, buf, size, type, path, flags);
 		free(buf);
 	} else {
-		void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
+		void *buf = xmmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
 		ret = index_mem(istate, oid, buf, size, type, path, flags);
 		munmap(buf, size);
 	}