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author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2006-03-31 10:30:24 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-31 20:18:52 (GMT) |
commit | 54d8d3b5a0ce1cdbad1d3154c9ea9732d394e9c7 (patch) | |
tree | 129a29ab92fba7dc99229c87a38fe8df3ade7b15 /arch/um/kernel | |
parent | dd77aec07aec5cb81aed3b4ef79c1ff8bd0e2a68 (diff) | |
download | linux-fsl-qoriq-54d8d3b5a0ce1cdbad1d3154c9ea9732d394e9c7.tar.xz |
[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.c | 7 |
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 38b1853..2135eaf 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(¤t->thread.regs.regs); } |