MIPS: Unbreak function tracer for 64-bit kernel.
Commit 58b69401c7
[MIPS: Function tracer: Fix broken function tracing]
completely broke the function tracer for 64-bit kernels. The symptom is
a system hang very early in the boot process.
The fix: Remove/fix $sp adjustments for 64-bit case.
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Al Cooper <alcooperx@gmail.com>
Cc: viric@viric.name
Cc: stable@vger.kernel.org # 3.8.x
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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@ -46,9 +46,8 @@
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PTR_L a5, PT_R9(sp)
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PTR_L a6, PT_R10(sp)
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PTR_L a7, PT_R11(sp)
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#else
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PTR_ADDIU sp, PT_SIZE
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#endif
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PTR_ADDIU sp, PT_SIZE
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.endm
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.macro RETURN_BACK
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@ -68,7 +67,11 @@ NESTED(ftrace_caller, PT_SIZE, ra)
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.globl _mcount
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_mcount:
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b ftrace_stub
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#ifdef CONFIG_32BIT
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addiu sp,sp,8
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#else
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nop
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#endif
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/* When tracing is activated, it calls ftrace_caller+8 (aka here) */
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lw t1, function_trace_stop
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