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Date: Fri, 08 Nov 2013 10:39:07 +0800
From: Chen Gang <gang.chen@...anux.com>
To: "vgupta@...opsys.com" <vgupta@...opsys.com>,
Arnd Bergmann <arnd@...db.de>, Jonas Bonn <jonas@...thpole.se>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"dhowells@...hat.com" <dhowells@...hat.com>
Subject: Re: [PATCH] arch: arc: uapi: be sure of "_UAPI" prefix for all guard
macros
On 11/08/2013 10:36 AM, Chen Gang wrote:
> For all uapi headers, need use "_UAPI" prefix for its guard macro
> (which will be stripped by "scripts/headers_installler.sh").
>
> And be sure of all "endif" append (or have correct) related comment.
>
> Also reserve guard macro in empty file, since some of "usr/include/*"
> header files may check guard macro to know whether content related
> header file.
>
Oh, sorry.
Need add additional comment for the normal header file which missing
guard macro.
And also need cc to David Howells which provide many valuable suggestions.
I will send patch v2 for it.
>
> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> ---
> arch/arc/include/uapi/asm/byteorder.h | 6 +++---
> arch/arc/include/uapi/asm/cachectl.h | 6 +++---
> arch/arc/include/uapi/asm/elf.h | 2 +-
> arch/arc/include/uapi/asm/setup.h | 9 +++++++--
> arch/arc/include/uapi/asm/sigcontext.h | 6 +++---
> arch/arc/include/uapi/asm/signal.h | 6 +++---
> arch/arc/include/uapi/asm/swab.h | 6 +++---
> arch/arc/include/uapi/asm/unistd.h | 4 ++++
> 8 files changed, 27 insertions(+), 18 deletions(-)
>
> diff --git a/arch/arc/include/uapi/asm/byteorder.h b/arch/arc/include/uapi/asm/byteorder.h
> index 9da71d4..859fde2 100644
> --- a/arch/arc/include/uapi/asm/byteorder.h
> +++ b/arch/arc/include/uapi/asm/byteorder.h
> @@ -6,8 +6,8 @@
> * published by the Free Software Foundation.
> */
>
> -#ifndef __ASM_ARC_BYTEORDER_H
> -#define __ASM_ARC_BYTEORDER_H
> +#ifndef _UAPI__ASM_ARC_BYTEORDER_H
> +#define _UAPI__ASM_ARC_BYTEORDER_H
>
> #ifdef CONFIG_CPU_BIG_ENDIAN
> #include <linux/byteorder/big_endian.h>
> @@ -15,4 +15,4 @@
> #include <linux/byteorder/little_endian.h>
> #endif
>
> -#endif /* ASM_ARC_BYTEORDER_H */
> +#endif /* _UAPI__ASM_ARC_BYTEORDER_H */
> diff --git a/arch/arc/include/uapi/asm/cachectl.h b/arch/arc/include/uapi/asm/cachectl.h
> index 51c73f0..2437fc6 100644
> --- a/arch/arc/include/uapi/asm/cachectl.h
> +++ b/arch/arc/include/uapi/asm/cachectl.h
> @@ -6,8 +6,8 @@
> * published by the Free Software Foundation.
> */
>
> -#ifndef __ARC_ASM_CACHECTL_H
> -#define __ARC_ASM_CACHECTL_H
> +#ifndef _UAPI__ARC_ASM_CACHECTL_H
> +#define _UAPI__ARC_ASM_CACHECTL_H
>
> /*
> * ARC ABI flags defined for Android's finegrained cacheflush requirements
> @@ -25,4 +25,4 @@
> #define DCACHE CF_D_FLUSH
> #define BCACHE (CF_I_INV | CF_D_FLUSH)
>
> -#endif
> +#endif /* _UAPI__ARC_ASM_CACHECTL_H */
> diff --git a/arch/arc/include/uapi/asm/elf.h b/arch/arc/include/uapi/asm/elf.h
> index 0f99ac8..4e82dc6 100644
> --- a/arch/arc/include/uapi/asm/elf.h
> +++ b/arch/arc/include/uapi/asm/elf.h
> @@ -23,4 +23,4 @@ typedef unsigned long elf_fpregset_t;
>
> typedef elf_greg_t elf_gregset_t[ELF_NGREG];
>
> -#endif
> +#endif /* _UAPI__ASM_ARC_ELF_H */
> diff --git a/arch/arc/include/uapi/asm/setup.h b/arch/arc/include/uapi/asm/setup.h
> index a6d4e44..09a8df7 100644
> --- a/arch/arc/include/uapi/asm/setup.h
> +++ b/arch/arc/include/uapi/asm/setup.h
> @@ -1,6 +1,11 @@
> /*
> * setup.h is part of userspace header ABI so UAPI scripts have to generate it
> * even if there's nothing to export - causing empty <uapi/asm/setup.h>
> - * However to prevent "patch" from discarding it we add this placeholder
> - * comment
> + *
> + * And some user programs may check guard macro to know whether content related
> + * header file (e.g. some of "/usr/include/ *" header files check guard macro),
> + * so recommend to still reserve guard macro in empty file.
> */
> +#ifndef _UAPI__ASM_ARC_SETUP_H
> +#define _UAPI__ASM_ARC_SETUP_H
> +#endif /* _UAPI__ASM_ARC_SETUP_H */
> diff --git a/arch/arc/include/uapi/asm/sigcontext.h b/arch/arc/include/uapi/asm/sigcontext.h
> index 9678a11..b2063ff 100644
> --- a/arch/arc/include/uapi/asm/sigcontext.h
> +++ b/arch/arc/include/uapi/asm/sigcontext.h
> @@ -6,8 +6,8 @@
> * published by the Free Software Foundation.
> */
>
> -#ifndef _ASM_ARC_SIGCONTEXT_H
> -#define _ASM_ARC_SIGCONTEXT_H
> +#ifndef _UAPI_ASM_ARC_SIGCONTEXT_H
> +#define _UAPI_ASM_ARC_SIGCONTEXT_H
>
> #include <asm/ptrace.h>
>
> @@ -19,4 +19,4 @@ struct sigcontext {
> struct user_regs_struct regs;
> };
>
> -#endif /* _ASM_ARC_SIGCONTEXT_H */
> +#endif /* _UAPI_ASM_ARC_SIGCONTEXT_H */
> diff --git a/arch/arc/include/uapi/asm/signal.h b/arch/arc/include/uapi/asm/signal.h
> index fad62f7..f212d83 100644
> --- a/arch/arc/include/uapi/asm/signal.h
> +++ b/arch/arc/include/uapi/asm/signal.h
> @@ -8,8 +8,8 @@
> * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
> */
>
> -#ifndef _ASM_ARC_SIGNAL_H
> -#define _ASM_ARC_SIGNAL_H
> +#ifndef _UAPI_ASM_ARC_SIGNAL_H
> +#define _UAPI_ASM_ARC_SIGNAL_H
>
> /*
> * This is much needed for ARC sigreturn optimization.
> @@ -24,4 +24,4 @@
>
> #include <asm-generic/signal.h>
>
> -#endif /* _ASM_ARC_SIGNAL_H */
> +#endif /* _UAPI_ASM_ARC_SIGNAL_H */
> diff --git a/arch/arc/include/uapi/asm/swab.h b/arch/arc/include/uapi/asm/swab.h
> index 095599a..7237a21 100644
> --- a/arch/arc/include/uapi/asm/swab.h
> +++ b/arch/arc/include/uapi/asm/swab.h
> @@ -13,8 +13,8 @@
> * -Hardware assisted single cycle bswap (Use Case of ARC custom instrn)
> */
>
> -#ifndef __ASM_ARC_SWAB_H
> -#define __ASM_ARC_SWAB_H
> +#ifndef _UAPI__ASM_ARC_SWAB_H
> +#define _UAPI__ASM_ARC_SWAB_H
>
> #include <linux/types.h>
>
> @@ -95,4 +95,4 @@
> #define __SWAB_64_THRU_32__
> #endif
>
> -#endif
> +#endif /* _UAPI__ASM_ARC_SWAB_H */
> diff --git a/arch/arc/include/uapi/asm/unistd.h b/arch/arc/include/uapi/asm/unistd.h
> index 6f30484..109f32c 100644
> --- a/arch/arc/include/uapi/asm/unistd.h
> +++ b/arch/arc/include/uapi/asm/unistd.h
> @@ -7,6 +7,8 @@
> */
>
> /******** no-legacy-syscalls-ABI *******/
> +#ifndef _UAPI_ASM_ARC_UNISTD_H
> +#define _UAPI_ASM_ARC_UNISTD_H
>
> #define __ARCH_WANT_SYS_EXECVE
> #define __ARCH_WANT_SYS_CLONE
> @@ -32,3 +34,5 @@ __SYSCALL(__NR_arc_gettls, sys_arc_gettls)
> /* Generic syscall (fs/filesystems.c - lost in asm-generic/unistd.h */
> #define __NR_sysfs (__NR_arch_specific_syscall + 3)
> __SYSCALL(__NR_sysfs, sys_sysfs)
> +
> +#endif /* _UAPI_ASM_ARC_UNISTD_H */
>
--
Chen Gang
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