linux-kernel - [RFC PATCH v2 4/5] x86/entry/64: remove interrupt macro

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Message-Id: <20180218123116.21334-5-linux@dominikbrodowski.net>
Date:   Sun, 18 Feb 2018 13:31:15 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     linux-kernel@...r.kernel.org, mingo@...nel.org, x86@...nel.org,
        brgerst@...il.com, luto@...nel.org, jpoimboe@...hat.com
Cc:     torvalds@...ux-foundation.org, ak@...ux.intel.com,
        tglx@...utronix.de, dan.j.williams@...el.com
Subject: [RFC PATCH v2 4/5] x86/entry/64: remove interrupt macro

It is now trivial to call the interrupt helper function and then the
actual worker. Therefore, remove the interrupt macro.

Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net>
---
 arch/x86/entry/entry_64.S | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 266bfcba3bb5..0ac2b4865d58 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -609,16 +609,6 @@ ENTRY(interrupt_helper)
 	ret
 END(interrupt_helper)
 
-/* 0(%rsp): ~(interrupt number) */
-	.macro interrupt func
-	cld
-
-	call	interrupt_helper
-
-	UNWIND_HINT_REGS indirect=1
-	call	\func	/* rdi points to pt_regs */
-	.endm
-
 	/*
 	 * The interrupt stubs push (~vector+0x80) onto the stack and
 	 * then jump to common_interrupt.
@@ -627,7 +617,9 @@ END(interrupt_helper)
 common_interrupt:
 	ASM_CLAC
 	addq	$-0x80, (%rsp)			/* Adjust vector to [-256, -1] range */
-	interrupt do_IRQ
+	call	interrupt_helper
+	UNWIND_HINT_REGS indirect=1
+	call	do_IRQ	/* rdi points to pt_regs */
 	/* 0(%rsp): old RSP */
 ret_from_intr:
 	DISABLE_INTERRUPTS(CLBR_ANY)
@@ -823,7 +815,9 @@ ENTRY(\sym)
 	ASM_CLAC
 	pushq	$~(\num)
 .Lcommon_\sym:
-	interrupt \do_sym
+	call	interrupt_helper
+	UNWIND_HINT_REGS indirect=1
+	call	\do_sym	/* rdi points to pt_regs */
 	jmp	ret_from_intr
 END(\sym)
 .endm
-- 
2.16.1