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  1. 11 10月, 2008 1 次提交
  3. 30 11月, 2007 1 次提交
  5. 27 11月, 2007 1 次提交
    • R
      [MIPS] Fix context DSP context / TLS pointer switching bug for new threads. · 07500b0d
      由 Ralf Baechle 提交于 
      A new born thread starts execution not in schedule but rather in
ret_from_fork which results in it bypassing the part of the code to
load a new context written in C which are the DSP context and the
userlocal register which Linux uses for the TLS pointer.  Frequently
we were just getting away with this bug for a number of reasons:

 o Real world application scenarios are very unlikely to use clone or fork
   in blocks of DSP code.
 o Linux by default runs the child process right after the fork, so the
   child by luck will find all the right context in the DSP and userlocal
   registers.
 o So far the rdhwr instruction was emulated on all hardware so userlocal
   wasn't getting referenced at all and the emulation wasn't suffering
   from the issue since it gets it's value straight from the thread's
   thread_info.

Fixed by moving the code to load the context from switch_to() to
finish_arch_switch which will be called by newborn and old threads.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      07500b0d
  7. 12 10月, 2007 2 次提交
  9. 03 10月, 2007 1 次提交
  11. 01 8月, 2007 1 次提交
  13. 21 7月, 2007 2 次提交
  15. 20 7月, 2007 1 次提交
  17. 11 7月, 2007 3 次提交
  19. 11 5月, 2007 1 次提交
  21. 10 5月, 2007 1 次提交
  23. 09 5月, 2007 2 次提交
  25. 17 3月, 2007 1 次提交
  27. 14 2月, 2007 1 次提交
    • R
      [MIPS] Improve branch prediction in ll/sc atomic operations. · f65e4fa8
      由 Ralf Baechle 提交于 
      Now that finally all supported versions of binutils have functioning
support for .subsection use .subsection to tweak the branch prediction

I did not modify the R10000 errata variants because it seems unclear if
this will invalidate the workaround which actually relies on the cheesy
prediction of branch likely to cause a misspredict if the sc was
successful.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      f65e4fa8
  29. 11 12月, 2006 1 次提交
  31. 05 12月, 2006 1 次提交
  33. 03 11月, 2006 1 次提交
  35. 15 7月, 2006 1 次提交
    • S
      [PATCH] remove set_wmb - arch removal · 52393ccc
      由 Steven Rostedt 提交于 
      set_wmb should not be used in the kernel because it just confuses the
code more and has no benefit.  Since it is not currently used in the
kernel this patch removes it so that new code does not include it.

All archs define set_wmb(var, value) to do { var = value; wmb(); }
while(0) except ia64 and sparc which use a mb() instead.  But this is
still moot since it is not used anyway.

Hasn't been tested on any archs but x86 and x86_64 (and only compiled
tested)
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      52393ccc
  37. 14 7月, 2006 1 次提交
  39. 26 4月, 2006 1 次提交
  41. 19 4月, 2006 3 次提交
  43. 21 3月, 2006 1 次提交
  45. 28 2月, 2006 1 次提交
  47. 13 1月, 2006 2 次提交
  49. 30 10月, 2005 8 次提交