From: Julien Thierry <julien.thierry@arm.com>
Date: Thu, 31 Jan 2019 14:58:40 +0000 (+0000)
Subject: arm64: Remove unused daif related functions/macros
X-Git-Tag: v5.1-rc1~82^2~39
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a82785a953e03444fe38616aed4d27b01da79a97;p=linux.git

arm64: Remove unused daif related functions/macros

There are some helpers to modify PSR.[DAIF] bits that are not referenced
anywhere. The less these bits are available outside of local_irq_*
functions the better.

Get rid of those unused helpers.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 4feb6119c3c9..7acf2436b578 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -62,16 +62,8 @@
 	.endm
 
 /*
- * Enable and disable interrupts.
+ * Save/restore interrupts.
  */
-	.macro	disable_irq
-	msr	daifset, #2
-	.endm
-
-	.macro	enable_irq
-	msr	daifclr, #2
-	.endm
-
 	.macro	save_and_disable_irq, flags
 	mrs	\flags, daif
 	msr	daifset, #2
diff --git a/arch/arm64/include/asm/daifflags.h b/arch/arm64/include/asm/daifflags.h
index 8d91f2233135..546bc398553e 100644
--- a/arch/arm64/include/asm/daifflags.h
+++ b/arch/arm64/include/asm/daifflags.h
@@ -43,16 +43,6 @@ static inline unsigned long local_daif_save(void)
 	return flags;
 }
 
-static inline void local_daif_unmask(void)
-{
-	trace_hardirqs_on();
-	asm volatile(
-		"msr	daifclr, #0xf		// local_daif_unmask"
-		:
-		:
-		: "memory");
-}
-
 static inline void local_daif_restore(unsigned long flags)
 {
 	if (!arch_irqs_disabled_flags(flags))