x86/entry/64: Move PUSH_AND_CLEAR_REGS from interrupt macro to helper function
authorDominik Brodowski <linux@dominikbrodowski.net>
Tue, 20 Feb 2018 21:01:08 +0000 (22:01 +0100)
committerIngo Molnar <mingo@kernel.org>
Wed, 21 Feb 2018 15:54:03 +0000 (16:54 +0100)
commit0e34d226342c27c4f96138b211547d423e4be8a1
tree037cfd309b4455e7b29c0afdcfb59baeb7fc405e
parentd72f4e29e6d84b7ec02ae93088aa459ac70e733b
x86/entry/64: Move PUSH_AND_CLEAR_REGS from interrupt macro to helper function

The PUSH_AND_CLEAR_REGS macro is able to insert the GP registers
"above" the original return address. This allows us to move a sizeable
part of the interrupt entry macro to an interrupt entry helper function:

   text    data     bss     dec     hex filename
  21088       0       0   21088    5260 entry_64.o-orig
  18006       0       0   18006    4656 entry_64.o

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: dan.j.williams@intel.com
Link: http://lkml.kernel.org/r/20180220210113.6725-2-linux@dominikbrodowski.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/entry/entry_64.S