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Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull x86 asm updates from Ingo Molnar:

 - Add UMIP emulation/spoofing for 64-bit processes as well, because of
   Wine based gaming.

 - Clean up symbols/labels in low level asm code

 - Add an assembly optimized mul_u64_u32_div() implementation on x86-64.

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/umip: Add emulation (spoofing) for UMIP covered instructions in 64-bit processes as well
  x86/asm: Make some functions local labels
  x86/asm/suspend: Get rid of bogus_64_magic
  x86/math64: Provide a sane mul_u64_u32_div() implementation for x86_64
This commit is contained in:
Linus Torvalds
2019-09-16 18:07:08 -07:00
parent 7e67a85999 e86c2c8b93
commit df4c0b18f2
9 changed files with 96 additions and 70 deletions
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4
arch/x86/entry/entry_64.S
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@@ -1058,10 +1058,10 @@ ENTRY(native_load_gs_index)
ENDPROC(native_load_gs_index)
EXPORT_SYMBOL(native_load_gs_index)
_ASM_EXTABLE(.Lgs_change, bad_gs)
_ASM_EXTABLE(.Lgs_change, .Lbad_gs)
.section .fixup, "ax"
/* running with kernelgs */
bad_gs:
.Lbad_gs:
SWAPGS /* switch back to user gs */
.macro ZAP_GS
/* This can't be a string because the preprocessor needs to see it. */