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| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-02-26 23:40:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-04 22:50:52 +0100 |
| commit | 14f6e9532dda399a7b789f744dc045f8865a9e42 (patch) | |
| tree | 6b293be6798770ae65e9dbe4fdf37175240e3682 /arch/x86/kernel/entry_64.S | |
| parent | x86/asm/entry/64: Clean up and document various entry code details (diff) | |
| download | linux-14f6e9532dda399a7b789f744dc045f8865a9e42.tar.xz linux-14f6e9532dda399a7b789f744dc045f8865a9e42.zip | |
x86/asm/entry/64/compat: Fold the IA32_ARG_FIXUP macro into its callers
Use of a small macro - one with conditional expansion - does
more harm than good. It obfuscates code, with minimal code
reuse.
For example, because of obfuscation it's not obvious that
in 'ia32_sysenter_target', we can optimize loading of r9 -
currently it is loaded with a detour through ebp.
This patch folds the IA32_ARG_FIXUP macro into its callers.
No code changes.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/4da092094cd78734384ac31e0d4ec1d8f69145a2.1424989793.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
0 files changed, 0 insertions, 0 deletions