Re: [Xen-devel] [PATCH v2 1/5] Use STR() as the only method for performing preprocessor stringificaion

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 29/05/2014 06:34, Feng Wu wrote:
> There are two ways of performing preprocessor stringificaion in the
> current code: __stringify() from stringify.h, and STR() from config.h.
> This patch consolidates down to one.
>
> Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

> ---
>   xen/arch/arm/domain_build.c           |  2 +-
>   xen/arch/x86/efi/boot.c               |  3 +--
>   xen/include/asm-arm/arm32/processor.h | 10 +++++-----
>   xen/include/asm-arm/cpregs.h          |  2 --
>   xen/include/asm-arm/sysregs.h         |  2 --
>   xen/include/asm-x86/asm_defns.h       |  5 ++---
>   xen/include/xen/stringify.h           | 12 ------------
>   7 files changed, 9 insertions(+), 27 deletions(-)
>   delete mode 100644 xen/include/xen/stringify.h
>
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index c424793..9636097 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -324,7 +324,7 @@ static int make_hypervisor_node(struct domain *d,
>                                   void *fdt, const struct dt_device_node 
> *parent)
>   {
>       const char compat[] =
> -        "xen,xen-"__stringify(XEN_VERSION)"."__stringify(XEN_SUBVERSION)"\0"
> +        "xen,xen-"STR(XEN_VERSION)"."STR(XEN_SUBVERSION)"\0"
>           "xen,xen";
>       __be32 reg[4];
>       gic_interrupt_t intr;
> diff --git a/xen/arch/x86/efi/boot.c b/xen/arch/x86/efi/boot.c
> index a772509..63874df 100644
> --- a/xen/arch/x86/efi/boot.c
> +++ b/xen/arch/x86/efi/boot.c
> @@ -16,7 +16,6 @@
>   # error Cannot use xen/pfn.h here!
>   #endif
>   #include <xen/string.h>
> -#include <xen/stringify.h>
>   #include <xen/vga.h>
>   #include <asm/e820.h>
>   #include <asm/edd.h>
> @@ -875,7 +874,7 @@ efi_start(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE 
> *SystemTable)
>               StdOut->SetMode(StdOut, best);
>       }
>   
> -    PrintStr(L"Xen " __stringify(XEN_VERSION) "." __stringify(XEN_SUBVERSION)
> +    PrintStr(L"Xen " STR(XEN_VERSION) "." STR(XEN_SUBVERSION)
>                XEN_EXTRAVERSION " (c/s " XEN_CHANGESET ") EFI loader\r\n");
>   
>       relocate_image(0);
> diff --git a/xen/include/asm-arm/arm32/processor.h 
> b/xen/include/asm-arm/arm32/processor.h
> index f41644d..8fe1241 100644
> --- a/xen/include/asm-arm/arm32/processor.h
> +++ b/xen/include/asm-arm/arm32/processor.h
> @@ -64,14 +64,14 @@ struct cpu_user_regs
>   #define CP64(r, name...) __CP64(r, name)
>   
>   /* Stringified for inline assembly */
> -#define LOAD_CP32(r, name...)  "mrc " __stringify(CP32(%r, name)) ";"
> -#define STORE_CP32(r, name...) "mcr " __stringify(CP32(%r, name)) ";"
> -#define LOAD_CP64(r, name...)  "mrrc " __stringify(CP64(%r, %H##r, name)) ";"
> -#define STORE_CP64(r, name...) "mcrr " __stringify(CP64(%r, %H##r, name)) ";"
> +#define LOAD_CP32(r, name...)  "mrc " STR(CP32(%r, name)) ";"
> +#define STORE_CP32(r, name...) "mcr " STR(CP32(%r, name)) ";"
> +#define LOAD_CP64(r, name...)  "mrrc " STR(CP64(%r, %H##r, name)) ";"
> +#define STORE_CP64(r, name...) "mcrr " STR(CP64(%r, %H##r, name)) ";"
>   
>   /* Issue a CP operation which takes no argument,
>    * uses r0 as a placeholder register. */
> -#define CMD_CP32(name...)      "mcr " __stringify(CP32(r0, name)) ";"
> +#define CMD_CP32(name...)      "mcr " STR(CP32(r0, name)) ";"
>   
>   #ifndef __ASSEMBLY__
>   
> diff --git a/xen/include/asm-arm/cpregs.h b/xen/include/asm-arm/cpregs.h
> index bf8133e..db1894f 100644
> --- a/xen/include/asm-arm/cpregs.h
> +++ b/xen/include/asm-arm/cpregs.h
> @@ -1,8 +1,6 @@
>   #ifndef __ASM_ARM_CPREGS_H
>   #define __ASM_ARM_CPREGS_H
>   
> -#include <xen/stringify.h>
> -
>   /*
>    * AArch32 Co-processor registers.
>    *
> diff --git a/xen/include/asm-arm/sysregs.h b/xen/include/asm-arm/sysregs.h
> index 4a4de34..ced3be7 100644
> --- a/xen/include/asm-arm/sysregs.h
> +++ b/xen/include/asm-arm/sysregs.h
> @@ -3,8 +3,6 @@
>   
>   #ifdef CONFIG_ARM_64
>   
> -#include <xen/stringify.h>
> -
>   /* AArch 64 System Register Encodings */
>   #define __HSR_SYSREG_c0  0
>   #define __HSR_SYSREG_c1  1
> diff --git a/xen/include/asm-x86/asm_defns.h b/xen/include/asm-x86/asm_defns.h
> index 87a462f..0b9f898 100644
> --- a/xen/include/asm-x86/asm_defns.h
> +++ b/xen/include/asm-x86/asm_defns.h
> @@ -8,7 +8,6 @@
>   #endif
>   #include <asm/processor.h>
>   #include <asm/percpu.h>
> -#include <xen/stringify.h>
>   #include <asm/cpufeature.h>
>   
>   #ifndef __ASSEMBLY__
> @@ -179,13 +178,13 @@ void ret_from_intr(void);
>   static inline void clac(void)
>   {
>       if ( boot_cpu_has(X86_FEATURE_SMAP) )
> -        asm volatile (__stringify(__ASM_CLAC) : : : "memory");
> +        asm volatile (STR(__ASM_CLAC) : : : "memory");
>   }
>   
>   static inline void stac(void)
>   {
>       if ( boot_cpu_has(X86_FEATURE_SMAP) )
> -        asm volatile (__stringify(__ASM_STAC) : : : "memory");
> +        asm volatile (STR(__ASM_STAC) : : : "memory");
>   }
>   #endif
>   
> diff --git a/xen/include/xen/stringify.h b/xen/include/xen/stringify.h
> deleted file mode 100644
> index 36808e0..0000000
> --- a/xen/include/xen/stringify.h
> +++ /dev/null
> @@ -1,12 +0,0 @@
> -#ifndef __XEN_STRINGIFY_H
> -#define __XEN_STRINGIFY_H
> -
> -/* Indirect stringification.  Doing two levels allows the parameter to be a
> - * macro itself.  For example, compile with -DFOO=bar, __stringify(FOO)
> - * converts to "bar".
> - */
> -
> -#define __stringify_1(x...) #x
> -#define __stringify(x...)   __stringify_1(x)
> -
> -#endif /* !__XEN_STRINGIFY_H */

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