This patchset simplifies jump maze in entry_64.S a bit by moving
"retint_kernel" code block, and follows up with simplifications
which become obvious after the move.
Two labels and one define is gone
One label is no longer .global
One redundand DISABLE_INTERRUPTS is gone
A few jump and test instructions use shorter forms now
text data bss dec hex filename
12706 0 0 12706 31a2 entry_64.o.before
12658 0 0 12658 3172 entry_64.o
Patchset was run-tested (running it while writing this).
Denys Vlasenko (5):
x86/asm/entry/64: move retint_kernel code block closer to its user
x86/asm/entry/64: simplify retint_kernel label usage, make
retint_restore_args label local
x86/asm/entry/64: remove redundant DISABLE_INTERRUPTS
x86/asm/entry/64: do not GET_THREAD_INFO() too early
x86/asm/entry/64: drop exit_intr label
arch/x86/kernel/entry_64.S | 40 +++++++++++++++++-----------------------
1 file changed, 17 insertions(+), 23 deletions(-)
---
CC: Linus Torvalds <torva...@linux-foundation.org>
CC: Steven Rostedt <rost...@goodmis.org>
CC: Ingo Molnar <mi...@kernel.org>
CC: Borislav Petkov <b...@alien8.de>
CC: "H. Peter Anvin" <h...@zytor.com>
CC: Andy Lutomirski <l...@amacapital.net>
CC: Oleg Nesterov <o...@redhat.com>
CC: Frederic Weisbecker <fweis...@gmail.com>
CC: Alexei Starovoitov <a...@plumgrid.com>
CC: Will Drewry <w...@chromium.org>
CC: Kees Cook <keesc...@chromium.org>
CC: x...@kernel.org
CC: linux-kernel@vger.kernel.org
--
1.8.1.4
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