arm64: drop redundant macros from read_cpuid()

asm/cputype.h contains a bunch of #defines for CPU id registers
that essentially map to themselves. Remove the #defines and pass
the tokens directly to the inline asm() that reads the registers.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 4 insertions, 14 deletions

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index 5fe138e0b828..e1af1b4200d5 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -16,23 +16,13 @@
 #ifndef __ASM_CPUTYPE_H
 #define __ASM_CPUTYPE_H
 
-#define ID_MIDR_EL1             "midr_el1"
-#define ID_MPIDR_EL1            "mpidr_el1"
-#define ID_CTR_EL0              "ctr_el0"
-
-#define ID_AA64PFR0_EL1         "id_aa64pfr0_el1"
-#define ID_AA64DFR0_EL1         "id_aa64dfr0_el1"
-#define ID_AA64AFR0_EL1         "id_aa64afr0_el1"
-#define ID_AA64ISAR0_EL1        "id_aa64isar0_el1"
-#define ID_AA64MMFR0_EL1        "id_aa64mmfr0_el1"
-
 #define INVALID_HWID            ULONG_MAX
 
 #define MPIDR_HWID_BITMASK      0xff00ffffff
 
 #define read_cpuid(reg) ({                                              \
         u64 __val;                                                      \
-        asm("mrs        %0, " reg : "=r" (__val));                      \
+        asm("mrs        %0, " #reg : "=r" (__val));                     \
         __val;                                                          \
 })
 
@@ -54,12 +44,12 @@
  */
 static inline u32 __attribute_const__ read_cpuid_id(void)
 {
-        return read_cpuid(ID_MIDR_EL1);
+        return read_cpuid(MIDR_EL1);
 }
 
 static inline u64 __attribute_const__ read_cpuid_mpidr(void)
 {
-        return read_cpuid(ID_MPIDR_EL1);
+        return read_cpuid(MPIDR_EL1);
 }
 
 static inline unsigned int __attribute_const__ read_cpuid_implementor(void)
@@ -74,7 +64,7 @@ static inline unsigned int __attribute_const__ read_cpuid_part_number(void)
 
 static inline u32 __attribute_const__ read_cpuid_cachetype(void)
 {
-        return read_cpuid(ID_CTR_EL0);
+        return read_cpuid(CTR_EL0);
 }
 
 #endif /* __ASSEMBLY__ */