[patch] little kunmap fix

Andrea Arcangeli (andrea@suse.de)
Mon, 13 Sep 1999 21:34:29 +0200 (CEST)

I spotted some minute ago a thinko in the kunmap debugging code. As kunmap
is only debugging code and it has to be disabled for production it's not
critical.

If somebody noticed kernel messages like:

Sep 13 19:31:40 laser kernel: not null pte on CPU 1 from c014de60
Sep 13 19:31:41 laser kernel: not null pte on CPU 1 from c011e7d4

then this fix against 2.3.18ac2 will cure the problem:

--- 2.3.18ac2/fs/proc/array.c.~1~ Wed Sep 8 00:26:02 1999
+++ 2.3.18ac2/fs/proc/array.c Mon Sep 13 21:15:25 1999
@@ -469,7 +469,7 @@
return result;
}
} while (addr & ~PAGE_MASK);
- kunmap(addr, KM_READ);
+ kunmap(addr-1, KM_READ);
}
return result;
}

Andrea

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