- 12 Oct, 2012 7 commits
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Al Viro authored
The only place where kernel_execve() is called without a way to return to the caller of kernel_thread() callback is kernel_post(). Reorganize kernel_init()/kernel_post() - instead of the former calling the latter in the end (and getting freed by it), have the latter *begin* with calling the former (and turn the latter into kernel_thread() callback, of course). Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
exec_usermodehelper_fns() will do just fine... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
... and now the asm glue side of that. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
It's needed only in setup_sigcontext() and it's always reg - <constant>; no point passing it all way down through the call chain. This is just the signal.c side of that stuff; next will come the asm glue one... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Turn the slow side of work_pending into C function, including all the looping. What we get out of that: * we do _not_ call get_signal_to_deliver() with IRQs disabled anymore * no need to save/restore volatiles on each pass if there turns to be more than one (unlikely, but still) * all double-restart prevention is in C now. * glue gets simpler. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
In case we have both NEED_RESCHED and SIGPENDING/NOTIFY_RESUME, handle the latter first. We'll get to original priorities in the next commit, but now that allows to simplify the treatment of NEED_RESCHED-only case nicely. Namely, now there no need to preserve the data for restarts across the call of schedule() in $work_resched; we can get there only if we had either returned from syscall without SIGPENDING (in which case we should've had no restart-worthy return value and want no restarts) or already got through do_notify_resume() call (in which case we want no restarts anymore). So we can just slap 0 into $19 instead of preserving it (and $20). Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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- 01 Oct, 2012 33 commits
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Richard Weinberger authored
This include is no longer needed. (seems to be a leftover from try_to_freeze()) Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Tell signal_delivered() to do it instead. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
... just tell signal_delivered() to do it. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
signal_delivered() will do it in the same case... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
no need to have the call of do_notify_resume() + checks around it duplicated for vm86 case - a bit of rearranging of ifdefs and we'll have a perfectly fine copy to jump back to. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
we can get into work_pending only if at least one of NEED_RESCHED, SIGPENDING or NOTIFY_RESUME is set. So once we'd found no NEED_RESCHED, there's no need to check that one of the other two is set. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Only the three usual flags (NEED_RESCHED/SIGPENDING/NOTIFY_RESUME) are looked at in the code checking _TIF_WORK_MASK on that one. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
entry.S code had been looping until no pending signals are left since 2005 anyway; no need to bother with that in do_signal() itself. If the failure to set a sigframe up raises SIGSEGV, we'll just pick it up the next time around the loop(s) in entry.S anyway. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Don't bother restoring r28 on syscall restarts; it's clobbered by syscall anyway. Reuse (now unused) ->orig_r28 as "no restarts allowed" flag. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Some architectures had blindly copied it for no reason whatsoever. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Make default just return 0. The current default (checking TIF_POLLING_NRFLAG) is taken to architectures that need it; ones that don't do polling in their idle threads don't need to defined TIF_POLLING_NRFLAG at all. ia64 defined both TS_POLLING (used by its tsk_is_polling()) and TIF_POLLING_NRFLAG (not used at all). Killed the latter... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
never used... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
bits 3..7 in flags are never set there, so this 0xff is pointless Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
If it's set, SIGPENDING is also set. And SIGPENDING is present in the masks... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
No need to keep 4 copies of that stuff; merged and taken to entry.S, unused public symbols there killed off. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
too late to do anything there... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
we *really* don't want to have restart logics hit when we are returning from sigreturn() - random replacement of %r4 with -4 just because a signal had been noticed from timer interrupt that came when %r4 happened to contain -514 is not nice at all. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
asm glue checks that Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Mark Salter authored
Signed-off-by:
Mark Salter <msalter@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Mark Salter authored
Signed-off-by:
Mark Salter <msalter@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Mark Salter authored
Signed-off-by:
Mark Salter <msalter@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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