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  1. 24 12月, 2013 1 次提交
  3. 15 7月, 2013 1 次提交
    • P
      sh: delete __cpuinit usage from all sh files · 4603f53a
      由 Paul Gortmaker 提交于 
      The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit  -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings.  In any case, they are temporary and harmless.

This removes all the arch/sh uses of the __cpuinit macros from
all C files.  Currently sh does not have any __CPUINIT used in
assembly files.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Paul Mundt <lethal@linux-sh.org>
Cc: linux-sh@vger.kernel.org
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
      4603f53a
  5. 02 4月, 2013 1 次提交
  7. 20 3月, 2013 1 次提交
  9. 15 3月, 2013 3 次提交
  11. 25 1月, 2013 8 次提交
  13. 09 8月, 2012 1 次提交
  15. 10 5月, 2012 5 次提交
  17. 17 4月, 2012 1 次提交
  19. 30 3月, 2012 1 次提交
  21. 29 3月, 2012 1 次提交
  23. 13 3月, 2012 1 次提交
  25. 07 3月, 2012 1 次提交
  27. 04 11月, 2011 1 次提交
  29. 24 12月, 2010 1 次提交
    • P
      sh: Fix up SH7201 clkfwk build. · 27f1accc
      由 Paul Mundt 提交于 
      The master clock initialization for SH7201 was wholly bogus. Users of the
legacy API must initialize the clock rate through the struct clk itself
rather than returning the clock frequency. Given that the init function
itself is void, returning the frequency isn't terribly effective.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      27f1accc
  31. 09 11月, 2010 1 次提交
  33. 21 4月, 2010 1 次提交
  35. 29 3月, 2010 1 次提交
  37. 10 3月, 2010 1 次提交
  39. 26 1月, 2010 1 次提交
    • P
      sh: Mass ctrl_in/outX to __raw_read/writeX conversion. · 9d56dd3b
      由 Paul Mundt 提交于 
      The old ctrl in/out routines are non-portable and unsuitable for
cross-platform use. While drivers/sh has already been sanitized, there
is still quite a lot of code that is not. This converts the arch/sh/ bits
over, which permits us to flag the routines as deprecated whilst still
building with -Werror for the architecture code, and to ensure that
future users are not added.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      9d56dd3b
  41. 13 1月, 2010 1 次提交
    • P
      sh: Move over to dynamically allocated FPU context. · 0ea820cf
      由 Paul Mundt 提交于 
      This follows the x86 xstate changes and implements a task_xstate slab
cache that is dynamically sized to match one of hard FP/soft FP/FPU-less.

This also tidies up and consolidates some of the SH-2A/SH-4 FPU
fragmentation. Now fpu state restorers are commonly defined, with the
init_fpu()/fpu_init() mess reworked to follow the x86 convention.
The fpu_init() register initialization has been replaced by xstate setup
followed by writing out to hardware via the standard restore path.

As init_fpu() now performs a slab allocation a secondary lighterweight
restorer is also introduced for the context switch.

In the future the DSP state will be rolled in here, too.

More work remains for math emulation and the SH-5 FPU, which presently
uses its own special (UP-only) interfaces.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      0ea820cf
  43. 15 12月, 2009 1 次提交
  45. 24 11月, 2009 2 次提交
    • P
      sh: Apply the sleazy FPU changes for SH-2A FPU as well. · 0f09e197
      由 Paul Mundt 提交于 
      This plugs in the fpu_counter manipulation for the SH-2A side also.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      0f09e197
    • S
      sh: Minor optimisations to FPU handling · d3ea9fa0
      由 Stuart Menefy 提交于 
      A number of small optimisations to FPU handling, in particular:

 - move the task USEDFPU flag from the thread_info flags field (which
   is accessed asynchronously to the thread) to a new status field,
   which is only accessed by the thread itself. This allows locking to
   be removed in most cases, or can be reduced to a preempt_lock().
   This mimics the i386 behaviour.

 - move the modification of regs->sr and thread_info->status flags out
   of save_fpu() to __unlazy_fpu(). This gives the compiler a better
   chance to optimise things, as well as making save_fpu() symmetrical
   with restore_fpu() and init_fpu().

 - implement prepare_to_copy(), so that when creating a thread, we can
   unlazy the FPU prior to copying the thread data structures.

Also make sure that the FPU is disabled while in the kernel, in
particular while booting, and for newly created kernel threads,

In a very artificial benchmark, the execution time for 2500000
context switches was reduced from 50 to 45 seconds.
Signed-off-by: NStuart Menefy <stuart.menefy@st.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      d3ea9fa0
  47. 15 8月, 2009 2 次提交
  49. 13 8月, 2009 1 次提交