From 198a6d5a6189501e2b8abf4e3149ccb337866f65 Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 10 Jan 2008 12:33:54 +0000 Subject: [PATCH] [ARM] pxa: silence warnings from cpu_is_xxx() macros If only a single CPU type is selected, __cpu_is_xxx() doesn't use its argument. This causes the compiler to issue a warning about an unused variable in the parent function. Signed-off-by: Russell King --- include/asm-arm/arch-pxa/hardware.h | 24 ++++++++---------------- include/asm-arm/system.h | 13 +++++++++++++ 2 files changed, 21 insertions(+), 16 deletions(-) diff --git a/include/asm-arm/arch-pxa/hardware.h b/include/asm-arm/arch-pxa/hardware.h index ab2d963..e25558f 100644 --- a/include/asm-arm/arch-pxa/hardware.h +++ b/include/asm-arm/arch-pxa/hardware.h @@ -121,38 +121,32 @@ #define cpu_is_pxa21x() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa21x(id); \ + __cpu_is_pxa21x(read_cpuid_id()); \ }) #define cpu_is_pxa25x() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa25x(id); \ + __cpu_is_pxa25x(read_cpuid_id()); \ }) #define cpu_is_pxa27x() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa27x(id); \ + __cpu_is_pxa27x(read_cpuid_id()); \ }) #define cpu_is_pxa300() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa300(id); \ + __cpu_is_pxa300(read_cpuid_id()); \ }) #define cpu_is_pxa310() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa310(id); \ + __cpu_is_pxa310(read_cpuid_id()); \ }) #define cpu_is_pxa320() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa320(id); \ + __cpu_is_pxa320(read_cpuid_id()); \ }) /* @@ -174,14 +168,12 @@ #define cpu_is_pxa2xx() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa2xx(id); \ + __cpu_is_pxa2xx(read_cpuid_id()); \ }) #define cpu_is_pxa3xx() \ ({ \ - unsigned int id = read_cpuid(CPUID_ID); \ - __cpu_is_pxa3xx(id); \ + __cpu_is_pxa3xx(read_cpuid_id()); \ }) /* diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h index 94ea8c6..28425c4 100644 --- a/include/asm-arm/system.h +++ b/include/asm-arm/system.h @@ -75,8 +75,21 @@ #ifndef __ASSEMBLY__ #include +#include #include +/* + * The CPU ID never changes at run time, so we might as well tell the + * compiler that it's constant. Use this function to read the CPU ID + * rather than directly reading processor_id or read_cpuid() directly. + */ +static inline unsigned int read_cpuid_id(void) __attribute_const__; + +static inline unsigned int read_cpuid_id(void) +{ + return read_cpuid(CPUID_ID); +} + #define __exception __attribute__((section(".exception.text"))) struct thread_info; -- 2.7.4