Skip to content

L
linux-davinci
Switch branch/tag
  1. 28 Nov, 2008 4 commits
    • Steven Rostedt's avatar
      powerpc: ftrace, use create_branch · 0029ff87
      Steven Rostedt authored 
      Impact: clean up

Paul Mackerras pointed out that the code to determine if the branch
can reach the destination is incorrect. Michael Ellerman suggested
to pull out the code from create_branch and use that.

Simply using create_branch is probably the best.
Reported-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Reported-by: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      0029ff87
    • Steven Rostedt's avatar
      powerpc: ftrace, added missing icache flush · ec682cef
      Steven Rostedt authored 
      Impact: fix to PowerPC code modification

After modifying code it is essential to flush the icache. This patch
adds the missing flush.
Reported-by: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      ec682cef
    • Steven Rostedt's avatar
      powerpc: ftrace, fix cast aliasing and add code verification · d9af12b7
      Steven Rostedt authored 
      Impact: clean up and robustness addition

This patch addresses the comments made by Paul Mackerras.
It removes the type casting between unsigned int and unsigned char
pointers, and replaces them with a use of all unsigned int.

Verification that the jump is indeed made to a trampoline has also
been added.
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d9af12b7
    • Steven Rostedt's avatar
      powerpc: ftrace, do nothing in mcount call for dyn ftrace · c7b0d173
      Steven Rostedt authored 
      Impact: quicken mcount calls that are not replaced by dyn ftrace

Dynamic ftrace no longer does on the fly recording of mcount locations.
The mcount locations are now found at compile time. The mcount
function no longer needs to store registers and call a stub function.
It can now just simply return.

Since there are some functions that do not get converted to a nop
(.init sections and other code that may disappear), this patch should
help speed up that code.

Also, the stub for mcount on PowerPC 32 can not be a simple branch
link register like it is on PowerPC 64. According to the ABI specification:

"The _mcount routine is required to restore the link register from
 the stack so that the profiling code can be inserted transparently,
 whether or not the profiled function saves the link register itself."

This means that we must restore the link register that was used
to make the call to mcount.  The minimal mcount function for PPC32
ends up being:

 mcount:
        mflr    r0
        mtctr   r0
        lwz     r0, 4(r1)
        mtlr    r0
        bctr

Where we move the link register used to call mcount into the
ctr register, and then restore the link register from the stack.
Then we use the ctr register to jump back to the mcount caller.
The r0 register is free for us to use.
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c7b0d173
  3. 23 Nov, 2008 1 commit
  5. 21 Nov, 2008 1 commit
    • Linus Torvalds's avatar
      Merge master.kernel.org:/home/rmk/linux-2.6-arm · ed313489
      Linus Torvalds authored 
      * master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] 5330/1: mach-pxa: Fixup reset for systems using reboot=cold or other strings
  [ARM] pxa: fix incorrect PCMCIA PSKTSEL pin configuration for spitz
  [ARM] pxa: fix I2C controller device being registered twice on Akita
  pxafb: only initialize the smart panel thread when dealing with a smartpanel
  pxafb: introduce LCD_TYPE_MASK and use it.
      ed313489
  7. 20 Nov, 2008 34 commits