[RFC PATCH v3 09/15] powerpc/syscall: Make syscall_64.c buildable on PPC32

[Christophe Leroy]

ifdef out specific PPC64 stuff to allow building
syscall_64.c on PPC32.

Modify Makefile to always build syscall.o

Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>
---
 arch/powerpc/kernel/Makefile  | 5 ++---
 arch/powerpc/kernel/syscall.c | 9 +++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 8cc3c831dccd..e4be425b7718 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -45,11 +45,10 @@ obj-y				:= cputable.o syscalls.o \
 				   signal.o sysfs.o cacheinfo.o time.o \
 				   prom.o traps.o setup-common.o \
 				   udbg.o misc.o io.o misc_$(BITS).o \
-				   of_platform.o prom_parse.o
+				   of_platform.o prom_parse.o syscall.o
 obj-y				+= ptrace/
 obj-$(CONFIG_PPC64)		+= setup_64.o sys_ppc32.o signal_64.o \
-				   paca.o nvram_64.o firmware.o note.o \
-				   syscall.o
+				   paca.o nvram_64.o firmware.o note.o
 obj-$(CONFIG_VDSO32)		+= vdso32/
 obj-$(CONFIG_PPC_WATCHDOG)	+= watchdog.o
 obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c
index 4c46f3aefaf8..98c98ce12f7d 100644
--- a/arch/powerpc/kernel/syscall.c
+++ b/arch/powerpc/kernel/syscall.c
@@ -34,7 +34,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
 		BUG_ON(!(regs->msr & MSR_RI));
 	BUG_ON(!(regs->msr & MSR_PR));
 	BUG_ON(!FULL_REGS(regs));
-	BUG_ON(regs->softe != IRQS_ENABLED);
+	BUG_ON(IS_ENABLED(CONFIG_PPC64) && get_softe(regs) != IRQS_ENABLED);
 
 	account_cpu_user_entry();
 
@@ -56,7 +56,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
 	 * frame, or if the unwinder was taught the first stack frame always
 	 * returns to user with IRQS_ENABLED, this store could be avoided!
 	 */
-	regs->softe = IRQS_ENABLED;
+	set_softe(regs, IRQS_ENABLED);
 
 	local_irq_enable();
 
@@ -114,6 +114,7 @@ static notrace inline bool prep_irq_for_enabled_exit(void)
 
 	/* This pattern matches prep_irq_for_idle */
 	__hard_EE_RI_disable();
+#ifdef CONFIG_PPC64
 	if (unlikely(lazy_irq_pending())) {
 		/* Took an interrupt, may have more exit work to do. */
 		__hard_RI_enable();
@@ -124,7 +125,7 @@ static notrace inline bool prep_irq_for_enabled_exit(void)
 	}
 	local_paca->irq_happened = 0;
 	irq_soft_mask_set(IRQS_ENABLED);
-
+#endif
 	return true;
 }
 
@@ -227,7 +228,7 @@ notrace unsigned long syscall_exit_prepare(unsigned long r3,
 	return ret;
 }
 
-#ifdef CONFIG_PPC_BOOK3S /* BOOK3E not yet using this */
+#ifdef CONFIG_PPC_BOOK3S_64 /* BOOK3E not yet using this */
 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs, unsigned long msr)
 {
 #ifdef CONFIG_PPC_BOOK3E
-- 
2.25.0