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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/x86/kernel/apic/apic.c
..
..
@@ -410,10 +410,9 @@
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 		if (vector && !eilvt_entry_is_changeable(vector, new))
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 			/* may not change if vectors are different */
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 			return rsvd;
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-		rsvd = atomic_cmpxchg(&eilvt_offsets[offset], rsvd, new);
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-	} while (rsvd != new);
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+	} while (!atomic_try_cmpxchg(&eilvt_offsets[offset], &rsvd, new));
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-	rsvd &= ~APIC_EILVT_MASKED;
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+	rsvd = new & ~APIC_EILVT_MASKED;
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 	if (rsvd && rsvd != vector)
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 		pr_info("LVT offset %d assigned for vector 0x%02x\n",
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 			offset, rsvd);