powerpc: Remove flush_instruction_cache for book3s/32

The only callers of flush_instruction_cache() are:

arch/powerpc/kernel/swsusp_booke.S:	bl flush_instruction_cache
arch/powerpc/mm/nohash/40x.c:	flush_instruction_cache();
arch/powerpc/mm/nohash/44x.c:	flush_instruction_cache();
arch/powerpc/mm/nohash/fsl_booke.c:	flush_instruction_cache();
arch/powerpc/platforms/44x/machine_check.c:			flush_instruction_cache();
arch/powerpc/platforms/44x/machine_check.c:		flush_instruction_cache();

This function is not used by book3s/32, drop it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/50098f49877cea0f46730a9df82dcabf84160e4b.1597384512.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 8d9cb5d..aa860b8 100644 (file)
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -258,9 +258,8 @@ _ASM_NOKPROBE_SYMBOL(real_writeb)
 
 /*
  * Flush instruction cache.
- * This is a no-op on the 601.
  */
-#ifndef CONFIG_PPC_8xx
+#if !defined(CONFIG_PPC_8xx) && !defined(CONFIG_PPC_BOOK3S_32)
 _GLOBAL(flush_instruction_cache)
 #if defined(CONFIG_4xx)
        lis     r3, KERNELBASE@h
@@ -277,18 +276,11 @@ _GLOBAL(flush_instruction_cache)
        mfspr   r3,SPRN_L1CSR1
        ori     r3,r3,L1CSR1_ICFI|L1CSR1_ICLFR
        mtspr   SPRN_L1CSR1,r3
-#elif defined(CONFIG_PPC_BOOK3S_601)
-       blr                     /* for 601, do nothing */
-#else
-       /* 603/604 processor - use invalidate-all bit in HID0 */
-       mfspr   r3,SPRN_HID0
-       ori     r3,r3,HID0_ICFI
-       mtspr   SPRN_HID0,r3
 #endif /* CONFIG_4xx */
        isync
        blr
 EXPORT_SYMBOL(flush_instruction_cache)
-#endif /* CONFIG_PPC_8xx */
+#endif
 
 /*
  * Copy a whole page.  We use the dcbz instruction on the destination