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| author | Ard Biesheuvel | 2015-03-04 11:49:32 +0100 |
|---|---|---|
| committer | Will Deacon | 2015-03-19 20:46:01 +0100 |
| commit | a44ef51799109dccba751240e84ca2da937a88ed (patch) | |
| tree | b8a50205aa97bcaee641b2eff56d678b23b44cba /arch/arm64/kernel | |
| parent | arm64: add macros for common adrp usages (diff) | |
| download | kernel-qcow2-linux-a44ef51799109dccba751240e84ca2da937a88ed.tar.gz kernel-qcow2-linux-a44ef51799109dccba751240e84ca2da937a88ed.tar.xz kernel-qcow2-linux-a44ef51799109dccba751240e84ca2da937a88ed.zip | |
arm64: remove processor_id
The global processor_id is assigned the MIDR_EL1 value of the boot
CPU in the early init code, but is never referenced afterwards.
As the relevance of the MIDR_EL1 value of the boot CPU is debatable
anyway, especially under big.LITTLE, let's remove it before anyone
starts using it.
Tested-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/head.S | 7 | ||||
| -rw-r--r-- | arch/arm64/kernel/setup.c | 3 |
2 files changed, 1 insertions, 9 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index ebb9e630230a..88f14a77eac0 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -244,7 +244,6 @@ ENTRY(stext) bl el2_setup // Drop to EL1, w20=cpu_boot_mode bl __calc_phys_offset // x24=PHYS_OFFSET, x28=PHYS_OFFSET-PAGE_OFFSET bl set_cpu_boot_mode_flag - mrs x22, midr_el1 // x22=cpuid bl __vet_fdt bl __create_page_tables // x25=TTBR0, x26=TTBR1 @@ -427,7 +426,6 @@ __switch_data: .quad __mmap_switched .quad __bss_start // x6 .quad __bss_stop // x7 - .quad processor_id // x4 .quad __fdt_pointer // x5 .quad memstart_addr // x6 .quad init_thread_union + THREAD_START_SP // sp @@ -445,11 +443,10 @@ __mmap_switched: str xzr, [x6], #8 // Clear BSS b 1b 2: - ldp x4, x5, [x3], #16 + ldr x5, [x3], #8 ldr x6, [x3], #8 ldr x16, [x3] mov sp, x16 - str x22, [x4] // Save processor ID str x21, [x5] // Save FDT pointer str x24, [x6] // Save PHYS_OFFSET mov x29, #0 @@ -621,8 +618,6 @@ ENTRY(secondary_startup) /* * Common entry point for secondary CPUs. */ - mrs x22, midr_el1 // x22=cpuid - pgtbl x25, x26, x28 // x25=TTBR0, x26=TTBR1 bl __cpu_setup // initialise processor diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 3852405d70b5..1783b38cf4c0 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -63,9 +63,6 @@ #include <asm/efi.h> #include <asm/virt.h> -unsigned int processor_id; -EXPORT_SYMBOL(processor_id); - unsigned long elf_hwcap __read_mostly; EXPORT_SYMBOL_GPL(elf_hwcap); |