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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/powerpc/include/asm/lppaca.h
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@@ -45,6 +45,7 @@
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 #include <asm/types.h>
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 #include <asm/mmu.h>
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 #include <asm/firmware.h>
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+#include <asm/paca.h>
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 /*
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  * The lppaca is the "virtual processor area" registered with the hypervisor,
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@@ -123,13 +124,23 @@
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  */
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 #define LPPACA_OLD_SHARED_PROC		2
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-static inline bool lppaca_shared_proc(struct lppaca *l)
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+#ifdef CONFIG_PPC_PSERIES
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+/*
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+ * All CPUs should have the same shared proc value, so directly access the PACA
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+ * to avoid false positives from DEBUG_PREEMPT.
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+ */
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+static inline bool lppaca_shared_proc(void)
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 {
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+	struct lppaca *l = local_paca->lppaca_ptr;
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+
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 	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
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 		return false;
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 	return !!(l->__old_status & LPPACA_OLD_SHARED_PROC);
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 }
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+#define get_lppaca()	(get_paca()->lppaca_ptr)
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+#endif
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+
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 /*
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  * SLB shadow buffer structure as defined in the PAPR.  The save_area
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  * contains adjacent ESID and VSID pairs for each shadowed SLB.  The