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sparc64,ftrace: Remove check of obsolete variable function_trace_stop 

Nothing sets function_trace_stop to disable function tracing anymore.
Remove the check for it in the arch code.

Link: http://lkml.kernel.org/r/20140703.211820.1674895115102216877.davem@davemloft.net

Cc: David S. Miller <davem@davemloft.net>
OKed-to-go-through-tracing-tree-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2014-06-25 12:22:53 -04:00 committed by Steven Rostedt
parent 6beecb9562
commit 2563b9d965
2 changed files with 2 additions and 9 deletions
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1
arch/sparc/Kconfig
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@ -55,7 +55,6 @@ config SPARC64
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_GRAPH_FP_TEST
select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select HAVE_KRETPROBES
select HAVE_KPROBES
select HAVE_RCU_TABLE_FREE if SMP

10
arch/sparc/lib/mcount.S
View File

@ -24,10 +24,7 @@ mcount:
#ifdef CONFIG_DYNAMIC_FTRACE
/* Do nothing, the retl/nop below is all we need. */
#else
sethi %hi(function_trace_stop), %g1
lduw [%g1 + %lo(function_trace_stop)], %g2
brnz,pn %g2, 2f
sethi %hi(ftrace_trace_function), %g1
sethi %hi(ftrace_trace_function), %g1
sethi %hi(ftrace_stub), %g2
ldx [%g1 + %lo(ftrace_trace_function)], %g1
or %g2, %lo(ftrace_stub), %g2
@ -80,11 +77,8 @@ ftrace_stub:
.globl ftrace_caller
.type ftrace_caller,#function
ftrace_caller:
sethi %hi(function_trace_stop), %g1
mov %i7, %g2
lduw [%g1 + %lo(function_trace_stop)], %g1
brnz,pn %g1, ftrace_stub
mov %fp, %g3
mov %fp, %g3
save %sp, -176, %sp
mov %g2, %o1
mov %g2, %l0