From: Alan Cox <alan@linux.intel.com>
Date: Fri, 21 Sep 2018 22:41:09 +0000 (+0100)
Subject: swap: fix a nasty little bug
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=cf382e5c12b32c18505aae9cc70391ddfa535227;p=FUZIX.git

swap: fix a nasty little bug

We checked against the wrong process for one case, that in turn meant a specific
pattern of activity could mess up when it tried to swap out a zombie process
---

diff --git a/Kernel/swap.c b/Kernel/swap.c
index c2c269c9..7e19b606 100644
--- a/Kernel/swap.c
+++ b/Kernel/swap.c
@@ -104,7 +104,7 @@ static ptptr swapvictim(ptptr p, int notself)
 			if (c->p_status == P_READY)
 				r = c;
 			if (c->p_status > P_READY
-			    && p->p_status <= P_FORKING) {
+			    && c->p_status <= P_FORKING) {
 				/* relative position in order of waits, bigger is longer, can wrap but
 				   shouldn't really matter to us much if it does */
 				s = (waitno - c->p_waitno);