linux-kernel - [PATCH V11 01/20] uapi: simplify __ARCH_FLOCK{,64}

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Date:   Sat,  2 Apr 2022 21:52:37 +0800
From:   guoren@...nel.org
To:     guoren@...nel.org, palmer@...belt.com, arnd@...db.de,
        gregkh@...uxfoundation.org, hch@....de
Cc:     linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-s390@...r.kernel.org, sparclinux@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-parisc@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        x86@...nel.org, heiko@...ech.de
Subject: [PATCH V11 01/20] uapi: simplify __ARCH_FLOCK{,64}_PAD a little

From: Christoph Hellwig <hch@....de>

Don't bother to define the symbols empty, just don't use them.
That makes the intent a little more clear.

Remove the unused HAVE_ARCH_STRUCT_FLOCK64 define and merge the
32-bit mips struct flock into the generic one.

Add a new __ARCH_FLOCK_EXTRA_SYSID macro following the style of
__ARCH_FLOCK_PAD to avoid having a separate definition just for
one architecture.

Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Guo Ren <guoren@...nel.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Tested-by: Heiko Stuebner <heiko@...ech.de>
---
 arch/mips/include/uapi/asm/fcntl.h     | 26 +++-----------------------
 include/uapi/asm-generic/fcntl.h       | 19 +++++++------------
 tools/include/uapi/asm-generic/fcntl.h | 19 +++++++------------
 3 files changed, 17 insertions(+), 47 deletions(-)

diff --git a/arch/mips/include/uapi/asm/fcntl.h b/arch/mips/include/uapi/asm/fcntl.h
index 42e13dead543..9e44ac810db9 100644
--- a/arch/mips/include/uapi/asm/fcntl.h
+++ b/arch/mips/include/uapi/asm/fcntl.h
@@ -50,30 +50,10 @@
 #define F_SETLKW64	35
 #endif
 
-/*
- * The flavours of struct flock.  "struct flock" is the ABI compliant
- * variant.  Finally struct flock64 is the LFS variant of struct flock.	 As
- * a historic accident and inconsistence with the ABI definition it doesn't
- * contain all the same fields as struct flock.
- */
-
 #if _MIPS_SIM != _MIPS_SIM_ABI64
-
-#include <linux/types.h>
-
-struct flock {
-	short	l_type;
-	short	l_whence;
-	__kernel_off_t	l_start;
-	__kernel_off_t	l_len;
-	long	l_sysid;
-	__kernel_pid_t l_pid;
-	long	pad[4];
-};
-
-#define HAVE_ARCH_STRUCT_FLOCK
-
-#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
+#define __ARCH_FLOCK_EXTRA_SYSID	long l_sysid;
+#define __ARCH_FLOCK_PAD		long pad[4];
+#endif
 
 #include <asm-generic/fcntl.h>
 
diff --git a/include/uapi/asm-generic/fcntl.h b/include/uapi/asm-generic/fcntl.h
index ecd0f5bdfc1d..77aa9f2ff98d 100644
--- a/include/uapi/asm-generic/fcntl.h
+++ b/include/uapi/asm-generic/fcntl.h
@@ -192,25 +192,19 @@ struct f_owner_ex {
 
 #define F_LINUX_SPECIFIC_BASE	1024
 
-#ifndef HAVE_ARCH_STRUCT_FLOCK
-#ifndef __ARCH_FLOCK_PAD
-#define __ARCH_FLOCK_PAD
-#endif
-
 struct flock {
 	short	l_type;
 	short	l_whence;
 	__kernel_off_t	l_start;
 	__kernel_off_t	l_len;
 	__kernel_pid_t	l_pid;
-	__ARCH_FLOCK_PAD
-};
+#ifdef	__ARCH_FLOCK_EXTRA_SYSID
+	__ARCH_FLOCK_EXTRA_SYSID
 #endif
-
-#ifndef HAVE_ARCH_STRUCT_FLOCK64
-#ifndef __ARCH_FLOCK64_PAD
-#define __ARCH_FLOCK64_PAD
+#ifdef	__ARCH_FLOCK_PAD
+	__ARCH_FLOCK_PAD
 #endif
+};
 
 struct flock64 {
 	short  l_type;
@@ -218,8 +212,9 @@ struct flock64 {
 	__kernel_loff_t l_start;
 	__kernel_loff_t l_len;
 	__kernel_pid_t  l_pid;
+#ifdef	__ARCH_FLOCK64_PAD
 	__ARCH_FLOCK64_PAD
-};
 #endif
+};
 
 #endif /* _ASM_GENERIC_FCNTL_H */
diff --git a/tools/include/uapi/asm-generic/fcntl.h b/tools/include/uapi/asm-generic/fcntl.h
index ac190958c981..99bc9b15ce2b 100644
--- a/tools/include/uapi/asm-generic/fcntl.h
+++ b/tools/include/uapi/asm-generic/fcntl.h
@@ -187,25 +187,19 @@ struct f_owner_ex {
 
 #define F_LINUX_SPECIFIC_BASE	1024
 
-#ifndef HAVE_ARCH_STRUCT_FLOCK
-#ifndef __ARCH_FLOCK_PAD
-#define __ARCH_FLOCK_PAD
-#endif
-
 struct flock {
 	short	l_type;
 	short	l_whence;
 	__kernel_off_t	l_start;
 	__kernel_off_t	l_len;
 	__kernel_pid_t	l_pid;
-	__ARCH_FLOCK_PAD
-};
+#ifdef	__ARCH_FLOCK_EXTRA_SYSID
+	__ARCH_FLOCK_EXTRA_SYSID
 #endif
-
-#ifndef HAVE_ARCH_STRUCT_FLOCK64
-#ifndef __ARCH_FLOCK64_PAD
-#define __ARCH_FLOCK64_PAD
+#ifdef	__ARCH_FLOCK_PAD
+	__ARCH_FLOCK_PAD
 #endif
+};
 
 struct flock64 {
 	short  l_type;
@@ -213,8 +207,9 @@ struct flock64 {
 	__kernel_loff_t l_start;
 	__kernel_loff_t l_len;
 	__kernel_pid_t  l_pid;
+#ifdef	__ARCH_FLOCK64_PAD
 	__ARCH_FLOCK64_PAD
-};
 #endif
+};
 
 #endif /* _ASM_GENERIC_FCNTL_H */
-- 
2.25.1