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6627a5fc-x86-MTRR-inverted-WC-check.patch
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File 6627a5fc-x86-MTRR-inverted-WC-check.patch of Package xen
# Commit 77e25f0e30ddd11e043e6fce84bf108ce7de5b6f # Date 2024-04-23 14:13:48 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> x86/MTRR: correct inadvertently inverted WC check The ! clearly got lost by mistake. Fixes: e9e0eb30d4d6 ("x86/MTRR: avoid several indirect calls") Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com> --- a/xen/arch/x86/cpu/mtrr/main.c +++ b/xen/arch/x86/cpu/mtrr/main.c @@ -316,7 +316,7 @@ int mtrr_add_page(unsigned long base, un } /* If the type is WC, check that this processor supports it */ - if ((type == X86_MT_WC) && mtrr_have_wrcomb()) { + if ((type == X86_MT_WC) && !mtrr_have_wrcomb()) { printk(KERN_WARNING "mtrr: your processor doesn't support write-combining\n"); return -EOPNOTSUPP;
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