FROMLIST: vsprintf: Inline call to ptr_to_hashval

There is concern that ptr_to_hashval not being inlined can cause performance
issues (unlike before where it was a static branch) with trace_printk being a
hot path for it. Just create an inline version called __ptr_to_hashval(), and
have the actual ptr_to_hashval() call it.

Bug: 145972256

Link: http://lore.kernel.org/r/20191113153816.14b95acd@gandalf.local.home


Link: lore.kernel.org/r/20191114164622.GC233237@google.com
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Change-Id: Ie7133b9f32a8185e244db2634b028b316a3d7ea1
Signed-off-by: Joel Fernandes <joel@joelfernandes.org>
Signed-off-by: Joel Fernandes <joelaf@google.com>
(cherry picked from commit 0f2b4ea6e2356687ce78ff23b8556d2138b6fe28)