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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-03-31 02:30:24 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 12:18:52 -0800
commit54d8d3b5a0ce1cdbad1d3154c9ea9732d394e9c7 (patch)
tree129a29ab92fba7dc99229c87a38fe8df3ade7b15 /arch/um/kernel
parentdd77aec07aec5cb81aed3b4ef79c1ff8bd0e2a68 (diff)
[PATCH] uml: add arch_switch_to for newly forked thread
Newly forked threads have no arch_switch_to_skas() called before their first run, because when schedule() switches to them they're resumed in the body of thread_wait() inside fork_handler() rather than in switch_threads() in switch_to_skas(). Compensate this missing call. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/kernel')
-rw-r--r--arch/um/kernel/skas/process_kern.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 38b185370c4..2135eaf98a9 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -91,10 +91,17 @@ void fork_handler(int sig)
panic("blech");
schedule_tail(current->thread.prev_sched);
+
+ /* XXX: if interrupt_end() calls schedule, this call to
+ * arch_switch_to_skas isn't needed. We could want to apply this to
+ * improve performance. -bb */
+ arch_switch_to_skas(current->thread.prev_sched, current);
+
current->thread.prev_sched = NULL;
/* Handle any immediate reschedules or signals */
interrupt_end();
+
userspace(&current->thread.regs.regs);
}