On Thu, Feb 2, 2023 at 4:54 PM Mark Rutland [off-list ref] wrote:

On Wed, Feb 01, 2023 at 05:34:17PM +0100, Florent Revest wrote:

quoted

Direct called trampolines can be called in two ways:
- either from the ftrace callsite. In this case, they do not access any
  struct ftrace_regs nor pt_regs
- Or, if a ftrace ops is also attached, from the end of a ftrace
  trampoline. In this case, the call_direct_funcs ops is in charge of
  setting the direct call trampoline's address in a struct ftrace_regs

Since "ftrace: pass fregs to arch_ftrace_set_direct_caller()", the later
case no longer requires a full pt_regs.

Minor nit, but could we please have the commit ID, e.g.

| Since commit:
|
|   9705bc70960459ae ("ftrace: pass fregs to arch_ftrace_set_direct_caller()")
|
| The latter case no longer requires a full pt_regs.

Sure thing, will do!