From 46f9469247c6f4697cbbf37e4b3961120bf07f29 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (VMware)" Date: Mon, 18 Nov 2019 10:41:29 -0500 Subject: ftrace: Rename ftrace_graph_stub to ftrace_stub_graph The ftrace_graph_stub was created and points to ftrace_stub as a way to assign the functon graph tracer function pointer to a stub function with a different prototype than what ftrace_stub has and not trigger the C verifier. The ftrace_graph_stub was created via the linker script vmlinux.lds.h. Unfortunately, powerpc already uses the name ftrace_graph_stub for its internal implementation of the function graph tracer, and even though powerpc would still build, the change via the linker script broke function tracer on powerpc from working. By using the name ftrace_stub_graph, which does not exist anywhere else in the kernel, this should not be a problem. Link: https://lore.kernel.org/r/1573849732.5937.136.camel@lca.pw Fixes: b83b43ffc6e4 ("fgraph: Fix function type mismatches of ftrace_graph_return using ftrace_stub") Reorted-by: Qian Cai Signed-off-by: Steven Rostedt (VMware) --- include/asm-generic/vmlinux.lds.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 0f358be551cd..996db32c491b 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -112,7 +112,7 @@ #ifdef CONFIG_FTRACE_MCOUNT_RECORD #ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY /* - * Need to also make ftrace_graph_stub point to ftrace_stub + * Need to also make ftrace_stub_graph point to ftrace_stub * so that the same stub location may have different protocols * and not mess up with C verifiers. */ @@ -120,17 +120,17 @@ __start_mcount_loc = .; \ KEEP(*(__patchable_function_entries)) \ __stop_mcount_loc = .; \ - ftrace_graph_stub = ftrace_stub; + ftrace_stub_graph = ftrace_stub; #else #define MCOUNT_REC() . = ALIGN(8); \ __start_mcount_loc = .; \ KEEP(*(__mcount_loc)) \ __stop_mcount_loc = .; \ - ftrace_graph_stub = ftrace_stub; + ftrace_stub_graph = ftrace_stub; #endif #else # ifdef CONFIG_FUNCTION_TRACER -# define MCOUNT_REC() ftrace_graph_stub = ftrace_stub; +# define MCOUNT_REC() ftrace_stub_graph = ftrace_stub; # else # define MCOUNT_REC() # endif -- cgit