ANDROID: mm: disable speculative page faults for CONFIG_NUMA
do_numa_page() uses pte_offset_map() directly and needs to implement
additional mechanisms to ensure the mempolicy object used in
numa_migrate_prep() is not destroyed from under it when speculating.
Rather than fixing this, just disable speculation for CONFIG_NUMA
for now and fix it if it's ever needed in Android.
Bug: 257443051
Change-Id: Ib5750b9809979a69a42ebfa6c130e123f416f1aa
Signed-off-by: Suren Baghdasaryan
diff --git a/mm/Kconfig b/mm/Kconfig
index 45adcb7..848a44a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -957,7 +957,7 @@
config SPECULATIVE_PAGE_FAULT
bool "Speculative page faults"
default y
- depends on ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT && MMU && SMP
+ depends on ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT && MMU && SMP && !NUMA
# split ptl lock can result in PTL destruction under RCU
depends on !ALLOC_SPLIT_PTLOCKS
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