From 520fc2415e83c0adfc1186ee922472c338cb4146 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Tue, 26 Apr 2005 19:27:27 -0700
Subject: Allow writing to the private index file mapping.

We now modify the in-memory copy of the index file in "diff-cache", so
we need to add PROT_WRITE.

diff --git a/read-cache.c b/read-cache.c
index 2354e80..53f1da8 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -198,7 +198,7 @@ int read_cache(void)
 		size = st.st_size;
 		errno = EINVAL;
 		if (size >= sizeof(struct cache_header) + 20)
-			map = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
+			map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
 	}
 	close(fd);
 	if (-1 == (int)(long)map)
-- 
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