[uml-devel] [PATCH] remove bootup deadlock on SMP

[Lennert B. <bu...@gn...>]

This patch is what the previous patch should have been..  please remind me
not to write patches at 5AM in the morning.

With this patch, things seem stable on SMP.  named (IIRC has a weird own
threading lib) seems to get into a segfault loop quickly after booting
though.  Am tracking that down right now.

17 processes: 16 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states:  0.0% user,  0.0% system,  0.0% nice, 100.0% idle
CPU1 states:  0.0% user,  0.0% system,  0.0% nice, 100.0% idle
CPU2 states:  0.0% user,  0.0% system,  0.0% nice, 100.0% idle
CPU3 states:  0.0% user,  0.0% system,  0.0% nice, 100.0% idle



--- linux-2.4.17-3um-jeff/arch/um/kernel/smp.c	Thu Jan  3 02:31:22 2002
+++ linux-2.4.17-3um-build/arch/um/kernel/smp.c	Thu Jan  3 12:28:56 2002
@@ -236,7 +236,7 @@
 /*****/
 static void (*func)(void *info);
 static void *info;
-static unsigned long smp_call_function_callin_map;
+static volatile unsigned long smp_call_function_callin_map;
 
 void smp_call_function_slave(int cpu)
 {