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* [PATCH 0/1] x86 change mov 0, %reg to xor %reg, %reg
@ 2022-08-04 15:26 Kanna Scarlet
  2022-08-04 15:26 ` [PATCH 1/1] x86: Change mov $0, %reg with " Kanna Scarlet
  0 siblings, 1 reply; 13+ messages in thread
From: Kanna Scarlet @ 2022-08-04 15:26 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen,
	H. Peter Anvin, x86
  Cc: Kanna Scarlet, Ard Biesheuvel, Bill Metzenthen, Brijesh Singh,
	Joerg Roedel, Josh Poimboeuf, Kirill A. Shutemov, Mark Rutland,
	Michael Roth, Peter Zijlstra, Sean Christopherson, Steven Rostedt,
	Ammar Faizi, GNU/Weeb Mailing List, Linux Kernel Mailing List

Hello Linux x86 maintainers,

I'm an informatic student 19 y.o. I am still studying Linux kernel open
source in GNU/Weeb community. I want to be a linux kerne dev in the
future. This is my first time sending a patch to Linux Kernel, I am
still learning the community. I may make a mistake in this email, please
correct me if i am wrong

I want to improve x86-64 assembly code with this patch. This patch
changes mov $0, %reg with xor %reg, %reg because xor %reg, %reg is
smaller so it is good to save space

asm:
ba 00 00 00 00  mov   $0x0,%edx
31 d2           xor   %edx,%edx


Regards,

Signed-off-by: Kanna Scarlet <[email protected]>
---

Kanna Scarlet (1):
  x86: Change mov $0, %reg with xor %reg, %reg

 arch/x86/boot/compressed/head_64.S     | 2 +-
 arch/x86/boot/compressed/mem_encrypt.S | 2 +-
 arch/x86/kernel/ftrace_32.S            | 4 ++--
 arch/x86/kernel/head_64.S              | 2 +-
 arch/x86/math-emu/div_Xsig.S           | 2 +-
 arch/x86/math-emu/reg_u_sub.S          | 2 +-
 6 files changed, 7 insertions(+), 7 deletions(-)


base-commit: ff89dd08c0f0a3fd330c9ef9d775e880f82c291e
-- 
Kanna Scarlet


^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2022-08-09  7:38 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-08-04 15:26 [PATCH 0/1] x86 change mov 0, %reg to xor %reg, %reg Kanna Scarlet
2022-08-04 15:26 ` [PATCH 1/1] x86: Change mov $0, %reg with " Kanna Scarlet
2022-08-04 15:53   ` Borislav Petkov
2022-08-04 18:08     ` Kanna Scarlet
2022-08-05  9:26       ` David Laight
2022-08-05  9:42         ` Joerg Roedel
2022-08-08 16:45           ` Kanna Scarlet
2022-08-08 18:59             ` H. Peter Anvin
2022-08-08 16:38         ` Kanna Scarlet
2022-08-08 18:59         ` H. Peter Anvin
2022-08-09  7:38           ` David Laight
2022-08-05  9:54       ` Borislav Petkov
2022-08-08 16:57         ` Kanna Scarlet

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