Messages in this thread Patch in this message | | | From | "Naveen N. Rao" <> | Subject | [RFC PATCH 07/14] powerpc/ftrace: Remove dead code | Date | Thu, 26 Nov 2020 23:38:44 +0530 |
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ftrace_plt_tramps[] was intended to speed up skipping plt branches, but the code wasn't completed. It is also not significantly better than reading and decoding the instruction. Remove the same.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> --- arch/powerpc/kernel/trace/ftrace.c | 8 -------- 1 file changed, 8 deletions(-)
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c index 42761ebec9f755..4fe5f373172fd2 100644 --- a/arch/powerpc/kernel/trace/ftrace.c +++ b/arch/powerpc/kernel/trace/ftrace.c @@ -332,7 +332,6 @@ static int setup_mcount_compiler_tramp(unsigned long tramp) struct ppc_inst op; unsigned long ptr; struct ppc_inst instr; - static unsigned long ftrace_plt_tramps[NUM_FTRACE_TRAMPS]; /* Is this a known long jump tramp? */ for (i = 0; i < NUM_FTRACE_TRAMPS; i++) @@ -341,13 +340,6 @@ static int setup_mcount_compiler_tramp(unsigned long tramp) else if (ftrace_tramps[i] == tramp) return 0; - /* Is this a known plt tramp? */ - for (i = 0; i < NUM_FTRACE_TRAMPS; i++) - if (!ftrace_plt_tramps[i]) - break; - else if (ftrace_plt_tramps[i] == tramp) - return -1; - /* New trampoline -- read where this goes */ if (probe_kernel_read_inst(&op, (void *)tramp)) { pr_debug("Fetching opcode failed.\n"); -- 2.25.4
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