segfault on startup if readonly protections is disabled

[jan]

If readonly protection is disabled a munmap(shm->ptr_ro, ...) is executed with ptr_ro = NULL.

Initializing shm->ptr_ro with XCACHE_MAP_FAILED is skipping the munmap().

--- mmap.c      2006-06-13 21:24:12.000000000 +0200
+++ mmap.c~     2006-06-05 08:43:25.000000000 +0200
@@ -153,7 +153,6 @@

        CHECK(shm = calloc(1, sizeof(xc_shm_t)), "shm OOM");
        shm->size = size;
-       shm->ptr_ro = XCACHE_MAP_FAILED;

        if (path == NULL || !path[0]) {
                static int inc = 0;

[moo]

good point. MAP_FAILED isn't NULL on all system, the logic checking shm->ptr shm->ptr_ro is messy. i'll fix it another way.

[anonymous]

in [79] (fix+cleanup for trunk), [80] (smallest fix for branch-1.0)