6.9-stable review patch. If anyone has any objections, please let me know.
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From: Juergen Gross jgross@suse.com
[ Upstream commit 02eac06b820c3eae73e5736ae62f986d37fed991 ]
Modify _lookup_address_cpa() to no longer use lookup_address(), but only lookup_address_in_pgd().
This is done in preparation of using lookup_address_in_pgd_attr().
No functional change intended.
Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Ingo Molnar mingo@kernel.org Link: https://lore.kernel.org/r/20240412151258.9171-4-jgross@suse.com Stable-dep-of: 5bc8b0f5dac0 ("x86/pat: Fix W^X violation false-positives when running as Xen PV guest") Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/mm/pat/set_memory.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index bfa0aae45d48c..4ebccaf29bf2a 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -744,11 +744,14 @@ EXPORT_SYMBOL_GPL(lookup_address); static pte_t *_lookup_address_cpa(struct cpa_data *cpa, unsigned long address, unsigned int *level) { - if (cpa->pgd) - return lookup_address_in_pgd(cpa->pgd + pgd_index(address), - address, level); + pgd_t *pgd; + + if (!cpa->pgd) + pgd = pgd_offset_k(address); + else + pgd = cpa->pgd + pgd_index(address);
- return lookup_address(address, level); + return lookup_address_in_pgd(pgd, address, level); }
/*