powerpc/ftrace: Remove ftrace_plt_tramps[]

ftrace_plt_tramps table is never filled so it is useless.

Remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/daeeb618a6619e3a7e3f82f1bd83ca7c25af6330.1652074503.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index f89bcaa5f0fc4a4849993995c048be8794529c63..010a8c7ff4ac7ae64c94eca65131097d764e29df 100644 (file)
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -250,7 +250,6 @@ static int setup_mcount_compiler_tramp(unsigned long tramp)
        int i;
        ppc_inst_t op;
        unsigned long ptr;
-       static unsigned long ftrace_plt_tramps[NUM_FTRACE_TRAMPS];
 
        /* Is this a known long jump tramp? */
        for (i = 0; i < NUM_FTRACE_TRAMPS; i++)
@@ -259,13 +258,6 @@ 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 (copy_inst_from_kernel_nofault(&op, (void *)tramp)) {
                pr_debug("Fetching opcode failed.\n");