sparc/function_graph: Simplify with function_graph_enter()
authorSteven Rostedt (VMware) <rostedt@goodmis.org>
Sun, 18 Nov 2018 22:37:40 +0000 (17:37 -0500)
committerSteven Rostedt (VMware) <rostedt@goodmis.org>
Wed, 28 Nov 2018 01:31:46 +0000 (20:31 -0500)
commit9c4bf5e0db164f330a2d3e128e9832661f69f0e9
tree6582db43ce41f8696811208d16b57a6e51ad1803
parentbc715ee4dbc5db462c59b9cfba92d31b3274fe3a
sparc/function_graph: Simplify with function_graph_enter()

The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().

Have sparc use the new code, and remove the shadow stack management as well as
having to set up the trace structure.

This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Cc: stable@kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
arch/sparc/kernel/ftrace.c