The patch titled
Subject: x86/asm: replace custom COUNT_ARGS() & CONCATENATE() implementations
has been added to the -mm mm-nonmm-unstable branch. Its filename is
x86-asm-replace-custom-count_args-concatenate-implementations.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-asm-replace-custom-count_args-concatenate-implementations.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Subject: x86/asm: replace custom COUNT_ARGS() & CONCATENATE() implementations
Date: Wed, 19 Jul 2023 00:11:45 +0300
Replace custom implementation of the macros from args.h.
Link: https://lkml.kernel.org/r/20230718211147.18647-3-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Brendan Higgins <brendan.higgins@xxxxxxxxx>
Cc: Daniel Latypov <dlatypov@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Gow <davidgow@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Cc: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Cc: Sudeep Holla <sudeep.holla@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/rmwcc.h | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
--- a/arch/x86/include/asm/rmwcc.h~x86-asm-replace-custom-count_args-concatenate-implementations
+++ a/arch/x86/include/asm/rmwcc.h
@@ -2,12 +2,7 @@
#ifndef _ASM_X86_RMWcc
#define _ASM_X86_RMWcc
-/* This counts to 12. Any more, it will return 13th argument. */
-#define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
-#define RMWcc_ARGS(X...) __RMWcc_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
-
-#define __RMWcc_CONCAT(a, b) a ## b
-#define RMWcc_CONCAT(a, b) __RMWcc_CONCAT(a, b)
+#include <linux/args.h>
#define __CLOBBERS_MEM(clb...) "memory", ## clb
@@ -48,7 +43,7 @@ cc_label: c = true; \
#define GEN_UNARY_RMWcc_3(op, var, cc) \
GEN_UNARY_RMWcc_4(op, var, cc, "%[var]")
-#define GEN_UNARY_RMWcc(X...) RMWcc_CONCAT(GEN_UNARY_RMWcc_, RMWcc_ARGS(X))(X)
+#define GEN_UNARY_RMWcc(X...) CONCATENATE(GEN_UNARY_RMWcc_, COUNT_ARGS(X))(X)
#define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0) \
__GEN_RMWcc(op " %[val], " arg0, var, cc, \
@@ -57,7 +52,7 @@ cc_label: c = true; \
#define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val) \
GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]")
-#define GEN_BINARY_RMWcc(X...) RMWcc_CONCAT(GEN_BINARY_RMWcc_, RMWcc_ARGS(X))(X)
+#define GEN_BINARY_RMWcc(X...) CONCATENATE(GEN_BINARY_RMWcc_, COUNT_ARGS(X))(X)
#define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...) \
__GEN_RMWcc(op " %[var]\n\t" suffix, var, cc, \
_
Patches currently in -mm which might be from andriy.shevchenko@xxxxxxxxxxxxxxx are
kernelh-split-out-count_args-and-concatenate-to-argsh.patch
x86-asm-replace-custom-count_args-concatenate-implementations.patch
arm64-smccc-replace-custom-count_args-concatenate-implementations.patch
genetlink-replace-custom-concatenate-implementation.patch
