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   Add a DMA constraint for the Rockchip RK3528 as well.

   ok patrick@

   realpath(3), meaning __realpath(2), should require pledge "rpath"

   Add support for version 2.2 of the Rockchip GPIO controller as found on
   the RK3576 SoC.

   ok kevlo@

   Create stub for __pledge_open(2) system call.  It is not being called yet.

   Create stub for __pledge_open(2) system call.  It is not being called yet.

   Add next/previous variables for windows in W: loop, from Conor Taylor in
   GitHub issue 4856.

   tmux: move block assigning to prefix a bit down to avoid a small leak

   ok nicm

   Fix server crash when control client session is destroyed, from Renaud
   Allard in GitHub issue 4916.

   Check for NULL value in tilde expansion before dereferencing, from
   Renaud Allard in GitHub issue 4916.

   We've never seen this panic where *_fast_ipi() fails because a cpu isn't
   responding.  I don't think we can see the panic -- I think we are so low
   that panic code will misbehave and more likely we see a hang.
   It is easier to accept this impossible failure, decrement the counter, and
   carry on.

   Inside libc, getpwent.c does not use dbopen() and instead uses unexported
   db functions.  The copy of the code outside libc, must use dbopen().
   -DFORCE_DBOPEN was used with #ifdef, but now that the file is an edited copy
   that is no longer neccessary.

   add support for PNVM data embedded in newer iwx(4) firmware files

   ok phessler@ kettenis@

   Add an additional "int fd" argument to the low-level db __{hash,rec,bt}_open()
   functions to provide for the caller allocating the fd itself.
   ok guenther

   Add O_CLEXEC to open()
   ok guenther

   move atomic.h include a bit down to match what matthieu committed

   If a fd came from libc doing the __pledge_open(2) system call, do not
   allow write(2), chmod(2), chflags(2), chown(2), ftruncate(2), or fdpassing.
   pledge_open(2) is an unexported interface that libc will use (soon) to
   open 2 devices (null and tty), about 9 files (based upon pledge promises),
   and files within the zoneinfo directory.  This works because libc only
   reads from those fd.  Currently those files are openable by non-libc code,
   but soon only static libc code will be able to do those opens.
   This does not transition libc to using the new system call, yet.
   Based upon long discussions with david leadbeater and beck.

   use ida_alloc_range() for ida_alloc_min() and ida_alloc_max()
   corrects ida_alloc_max() range end

   The range end argument of idr_alloc() is exclusionary.  Don't try to
   insert into the idr tree with an id value matching the end.

   unifdef unused idr random path

   remove unused ida_simple* which no longer exist in linux

   no need to include both sys/atomic.h and machine/atomic.h

   include sys/atomic.h for atomic_inc_int()

   Add missing sys/atomic.h

   Add missing sys/atomic.h. ok miod@

   Fix pledge/unveil issues relating to manual opening of /etc/resolv.conf
   uncovered by david leadbeater and florian, and later on also by sthen

   calendar -a uses different pledge, add test for that.

   use atomic_inc_int() on more fields in uvmexp

   mark a few more (MD incremented) fields in uvmexp as [a] atomic

   typo

   sync