linux-toradex.git/arch/mips/kernel/process.c, branch v2.6.19.2

[MIPS] Use kallsyms_lookup_size_offset() instead of kallsyms_lookup()

2006-10-19T16:55:12+00:00

This new routine doesn't lookup for symbol names. So we needn't
to pass any char buffers or pointer since we don't care about
names.

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle

[MIPS] Make sure cpu_has_fpu is used only in atomic context

2006-10-09T22:20:48+00:00

Make sure cpu_has_fpu (which uses smp_processor_id()) is used only in
atomic context.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] Make unwind_stack() can dig into interrupted context

2006-10-01T22:16:59+00:00

If the PC was ret_from_irq or ret_from_exception, there will be no
more normal stackframe.  Instead of stopping the unwinding, use PC and
RA saved by an exception handler to continue unwinding into the
interrupted context.  This also simplifies the CONFIG_STACKTRACE code.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] lockdep: Add STACKTRACE_SUPPORT and enable LOCKDEP_SUPPORT

2006-10-01T22:16:57+00:00

Implement stacktrace interface by using unwind_stack() and enable lockdep
support in Kconfig.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] get_wchan(): remove uses of mfinfo[64]

2006-09-27T12:37:58+00:00

This array was used to 'cache' some frame info about scheduler
functions to speed up get_wchan(). This array was 1Ko size and
was only used when CONFIG_KALLSYMS was set but declared for all
configs.

Rather than make the array statement conditional, this patches
removes this array and its uses. Indeed the common case doesn't
seem to use this array and get_wchan() is not a critical path
anyways.

It results in a smaller bss and a smaller/cleaner code:

   text    data     bss     dec     hex filename
2543808  254148  139296 2937252  2cd1a4 vmlinux-new-get-wchan
2544080  254148  143392 2941620  2ce2b4 vmlinux~old

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle

[MIPS] get_frame_info(): null function size means size is unknown

2006-09-27T12:37:58+00:00

This patch adds 2 sanity checks.

The first one test that the start address of the function to analyze has been
set by the caller. If not return an error since nothing usefull can be done
without.

The second one checks that the function's size has been set. A null size can
happen if CONFIG_KALLSYMS is not set and it means that we don't know the size
of the function to analyze. In this case, we make it equal to 128 instructions
by default.

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle

[MIPS] unwind_stack(): return ra if an exception occured at the first instruction

2006-09-27T12:37:58+00:00

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle

[MIPS] Improve unwind_stack()

2006-09-27T12:37:29+00:00

This patch allows unwind_stack() to return ra for leaf function.
But it tries to detects cases where get_frame_info() wrongly
consider nested function as a leaf one.

It also pass 'unsinged long *sp' instead of 'unsigned long **sp'
as second parameter. The code looks cleaner.

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle

[MIPS] Make get_frame_info() more robust

2006-09-27T12:37:28+00:00

Now get_frame_info() wants to detect move sp instruction first. It
assumes that the save ra in the stack instruction can't happen
before allocating frame size space into the stack.

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle

[MIPS] Make frame_info_init() more readable.

2006-09-27T12:37:27+00:00

Signed-off-by: Franck Bui-Huu 
Signed-off-by: Ralf Baechle