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 <[email protected]>
CC: Steven Rostedt <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: Borislav Petkov <[email protected]>
CC: "H. Peter Anvin" <[email protected]>
CC: Andy Lutomirski <[email protected]>
CC: Oleg Nesterov <[email protected]>
CC: Frederic Weisbecker <[email protected]>
CC: Alexei Starovoitov <[email protected]>
CC: Will Drewry <[email protected]>
CC: Kees Cook <[email protected]>
CC: [email protected]
CC: [email protected]
--
1.8.1.4
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