Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'x86-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Thomas Gleixner:
"A single fix for x86.
Revert the recent change to the MTRR code which aimed to support
SEV-SNP guests on Hyper-V. It caused a regression on XEN Dom0 kernels.
The underlying issue of MTTR (mis)handling in the x86 code needs some
deeper investigation and is definitely not 6.2 material"
* tag 'x86-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mtrr: Revert 90b926e68f50 ("x86/pat: Fix pat_x_mtrr_type() for MTRR disabled case")
+1
-2
+1
-2
arch/x86/mm/pat/memtype.c
+1
-2
arch/x86/mm/pat/memtype.c
···
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u8 mtrr_type, uniform;
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mtrr_type = mtrr_type_lookup(start, end, &uniform);
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-
if (mtrr_type != MTRR_TYPE_WRBACK &&
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mtrr_type != MTRR_TYPE_INVALID)
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+
if (mtrr_type != MTRR_TYPE_WRBACK)
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return _PAGE_CACHE_MODE_UC_MINUS;
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return _PAGE_CACHE_MODE_WB;