1. 20 8月, 2007 2 次提交
  2. 19 8月, 2007 25 次提交
  3. 18 8月, 2007 4 次提交
  4. 17 8月, 2007 5 次提交
    • D
      [MATH-EMU]: Fix underflow exception reporting. · 40584961
      David S. Miller 提交于
      The underflow exception cases were wrong.
      
      This is one weird area of ieee1754 handling in that the underflow
      behavior changes based upon whether underflow is enabled in the trap
      enable mask of the FPU control register.  As a specific case the Sparc
      V9 manual gives us the following description:
      
      --------------------
      If UFM = 0:     Underflow occurs if a nonzero result is tiny and a
                      loss of accuracy occurs.  Tininess may be detected
                      before or after rounding.  Loss of accuracy may be
                      either a denormalization loss or an inexact result.
      
      If UFM = 1:     Underflow occurs if a nonzero result is tiny.
                      Tininess may be detected before or after rounding.
      --------------------
      
      What this amounts to in the packing case is if we go subnormal,
      we set underflow if any of the following are true:
      
      1) rounding sets inexact
      2) we ended up rounding back up to normal (this is the case where
         we set the exponent to 1 and set the fraction to zero), this
         should set inexact too
      3) underflow is set in FPU control register trap-enable mask
      
      The initially discovered example was "DBL_MIN / 16.0" which
      incorrectly generated an underflow.  It should not, unless underflow
      is set in the trap-enable mask of the FPU csr.
      
      Another example, "0x0.0000000000001p-1022 / 16.0", should signal both
      inexact and underflow.  The cpu implementations and ieee1754
      literature is very clear about this.  This is case #2 above.
      
      However, if underflow is set in the trap enable mask, only underflow
      should be set and reported as a trap.  That is handled properly by the
      prioritization logic in
      
      arch/sparc{,64}/math-emu/math.c:record_exception().
      
      Based upon a report and test case from Jakub Jelinek.
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      40584961
    • I
      [POWERPC] Fix invalid semicolon after if statement · 2b02d139
      Ilpo Järvinen 提交于
      A similar fix to netfilter from Eric Dumazet inspired me to
      look around a bit by using some grep/sed stuff as looking for
      this kind of bugs seemed easy to automate.  This is one of them
      I found where it looks like this semicolon is not valid.
      Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
      Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      2b02d139
    • D
    • A
      [IA64] Failure to grow RBS · e8c59c0c
      Andrew Burgess 提交于
      There is a bug in the ia64_do_page_fault code that can cause a failure
      to grow the register backing store, or any mapping that is marked as
      VM_GROWSUP if the mapping is the highest mapped area of memory.
      
      When the address accessed is below the first mapping the previous mapping
      is returned as NULL, and this case is handled.  However, when the address
      accessed is above the highest mapping the vma returned is NULL, this
      case is not handled correctly, and it fails to spot that this access
      might require an existing mapping to grow upwards.
      Signed-off-by: NAndrew Burgess <andrew@transitive.com>
      Signed-off-by: NTony Luck <tony.luck@intel.com>
      e8c59c0c
    • A
      sh: remove extraneous ; on scif_sercon_putc wait loop · 96989d9d
      Andy Whitcroft 提交于
      It seems we have gained an extraneous trailing ';' on one of the
      wait loops in scif_sercon_putc().  Although this is completely
      benign as the apparent payload is also the empty statement, it
      invites error in the future.  Clean it up now.
      Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      96989d9d
  5. 16 8月, 2007 4 次提交