cvs commit: src/sys/sparc64/sparc64 trap.c

[Marius Strobl]

marius      2008-08-28 18:34:56 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/sparc64/sparc64  trap.c 
  Log:
  SVN rev 182392 on 2008-08-28 18:34:56Z by marius
  
  MFC: r182122
  
  There's a race in kmem(4) between checking whether a page is resident
  in the kernel and copying it out, causing a panic when faulting on a
  nofault entry. Handle this case gracefully by letting the kernel copy
  functions return EFAULT instead. As such this change addresses the
  same problem as r154721 does for i386.
  
  Revision  Changes    Path
  1.88.2.4  +14 -0     src/sys/sparc64/sparc64/trap.c