linux-kernel - [PATCH v4 12/23] powerpc/syscall: Make syscall.c buildable on PPC32

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Date:   Mon, 25 Jan 2021 14:48:25 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, npiggin@...il.com,
        msuchanek@...e.de
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v4 12/23] powerpc/syscall: Make syscall.c buildable on PPC32

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

Modify Makefile to always build syscall.o

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/kernel/Makefile  | 4 ++--
 arch/powerpc/kernel/syscall.c | 9 +++++----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 1cbc51fc82fd..23c127db0d0c 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -46,10 +46,10 @@ obj-y				:= cputable.o syscalls.o \
 				   prom.o traps.o setup-common.o \
 				   udbg.o misc.o io.o misc_$(BITS).o \
 				   of_platform.o prom_parse.o firmware.o \
-				   hw_breakpoint_constraints.o
+				   hw_breakpoint_constraints.o syscall.o
 obj-y				+= ptrace/
 obj-$(CONFIG_PPC64)		+= setup_64.o \
-				   paca.o nvram_64.o note.o syscall.o
+				   paca.o nvram_64.o note.o
 obj-$(CONFIG_COMPAT)		+= sys_ppc32.o signal_32.o
 obj-$(CONFIG_VDSO32)		+= vdso32/
 obj-$(CONFIG_PPC_WATCHDOG)	+= watchdog.o
diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c
index b627a6384029..bf9bf4b5bc41 100644
--- a/arch/powerpc/kernel/syscall.c
+++ b/arch/powerpc/kernel/syscall.c
@@ -39,7 +39,7 @@ 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(arch_irq_disabled_regs(regs));
 
 #ifdef CONFIG_PPC_PKEY
 	if (mmu_has_feature(MMU_FTR_PKEY)) {
@@ -77,7 +77,7 @@ 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;
+	irq_soft_mask_regs_set_state(regs, IRQS_ENABLED);
 
 	local_irq_enable();
 
@@ -147,6 +147,7 @@ static notrace inline bool prep_irq_for_enabled_exit(bool clear_ri)
 		__hard_EE_RI_disable();
 	else
 		__hard_irq_disable();
+#ifdef CONFIG_PPC64
 	if (unlikely(lazy_irq_pending_nocheck())) {
 		/* Took an interrupt, may have more exit work to do. */
 		if (clear_ri)
@@ -158,7 +159,7 @@ static notrace inline bool prep_irq_for_enabled_exit(bool clear_ri)
 	}
 	local_paca->irq_happened = 0;
 	irq_soft_mask_set(IRQS_ENABLED);
-
+#endif
 	return true;
 }
 
@@ -281,7 +282,7 @@ 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