powerpc/mm/radix: mark __radix__flush_tlb_range_psize() as __always_inline

This prepares to move CONFIG_OPTIMIZE_INLINING from x86 to a common
place.  We need to eliminate potential issues beforehand.

If it is enabled for powerpc, the following error is reported:

  arch/powerpc/mm/tlb-radix.c: In function '__radix__flush_tlb_range_psize':
  arch/powerpc/mm/tlb-radix.c:104:2: error: asm operand 3 probably doesn't match constraints [-Werror]
    asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
    ^~~
  arch/powerpc/mm/tlb-radix.c:104:2: error: impossible constraint in 'asm'

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Masahiro Yamada <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Boris Brezillon <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Norris <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Malaterre <[email protected]>
Cc: Miquel Raynal <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Russell King <[email protected]>
Cc: Stefan Agner <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: masahir0y

arch/powerpc/mm/book3s64/radix_tlb.c

@@ -928,7 +928,7 @@ void radix__tlb_flush(struct mmu_gather *tlb)
 	tlb->need_flush_all = 0;
 }
 
-static inline void __radix__flush_tlb_range_psize(struct mm_struct *mm,
+static __always_inline void __radix__flush_tlb_range_psize(struct mm_struct *mm,
 				unsigned long start, unsigned long end,
 				int psize, bool also_pwc)
 {