Merge patch series "list.h/treewide: get rid of no-op prefetch()"

Rasmus Villemoes <ravi@prevas.dk> says:

While looking through list.h, I saw that the regular list_* helpers
(and one of the hlist_* ones) still contain the prefetch() that was
removed in linux 14 years ago. It doesn't do anything, but makes the
macros harder to read, so get rid of it, and the fallback, no-op
definition that they relied on. That requires removing a few uses
outside list.h as well.

checkpatch warns about some whitespace issues in list.h, but as I've
copied whole kerneldoc+#define blocks directly from the linux kernel,
I think it's better to just accept that so that we don't introduce
needless diffs. The "macro argument reuse" arguments should also be
ignored, as e.g. the "member" arguments are obviously always just bare
identifiers, and the "pos" arguments must be assigned to multiple
times.

Link: https://lore.kernel.org/r/20250507121246.518691-1-ravi@prevas.dk

arch/mips/include/asm/processor.h

@@ -118,20 +118,4 @@ struct task_struct;
  */
 #define return_address() ({__asm__ __volatile__("":::"$31");__builtin_return_address(0);})
 
-#ifdef CONFIG_CPU_HAS_PREFETCH
-
-#define ARCH_HAS_PREFETCH
-
-static inline void prefetch(const void *addr)
-{
-	__asm__ __volatile__(
-	"	.set	mips4		\n"
-	"	pref	%0, (%1)	\n"
-	"	.set	mips0		\n"
-	:
-	: "i" (Pref_Load), "r" (addr));
-}
-
-#endif
-
 #endif /* _ASM_PROCESSOR_H */