ensure that no one else have the same lock.
a patch from Stephan Uphoff, FreeBSD PR/69934.
(http://www.freebsd.org/cgi/query-pr.cgi?pr=69934)
> Upgrading a lock does not play well together with acquiring
> an exclusive lock and can lead to two threads being
> granted exclusive access.
>
> Problematic sequence:
> Thread A acquires a previous unlocked lock in shared mode.
> Thread B tries to acquire the same lock in exclusive mode
> and blocks.
> Thread A upgrades its lock - waking up thread B.
> Thread B wakes up and also acquires the same lock as it only checks
> if the lock is not shared or if someone wants to upgrade the lock
> and not if someone already upgraded the lock to an exclusive lock.
(Needs a libcurses fix as well).
No need to ponce about with __m_endwin (to remember we've done endwin()),
the old recovery was wrong in any case - but I've left something that
will do an explicit redraw.
Allow the 'help' text to be from a variable (and hence translated).
Fix the display of help so that the screen underneath is actually cleared.
Preserve the screen contents while displaying help - redraw is too hard.
Use endwin(); doupdate(); to do the full refresh when ^L is typed.
Move menus up the screen if they would hit the bottom with too few lines
to show an item and the scroll text (happens with big titles).
Make 'y=0' center the window vertically - use of 0 means you can't have
a menu starting on the topline, but this is unlikely to be a problem.
Make all the menu options settable from the control file, not just from
dynamic menus.
Redo menu option list part of man page.
In default_chip_map() we'll do further checks to see if the channel should
really be enabled, and in case it's not we would keep the interrupt mapped.
Fix kern/26502 from Christian Biere.
* cardbusdevs -> pcidevs
* Add a Microsoft product.
* Use tlp_cardbus_{disable,enable}() in the powerhook. This is an experiment
and may need more work.
according to the controller-dependant registers while wdc was not waiting for
an interrupt). A reset can generate spurious interrupts (or even a flow of
spurious interrupts on the promise) that needs to be properly acknowledged.
Eliminating redundant pointers in the tables saves nearly 20K (20% of the table
size). In the process, add a pci_findproduct() and make that and
pci_findvendor() return a "const char *".
bdf.ms:270: fatal error: input stack limit exceeded (probable
infinite loop)
that appears when building the xorg-docs package.
Problem reported to current-users by Kouichirou Hiratsuka.
Fix provided by groff maintainer, Werner Lemberg.
drochner