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- Fix tegra194-cpufreq module build failure caused __cpu_logical_map

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not exported.
 
 - Improve fixed_addresses comment regarding the fixmap buffer sizes.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - Fix tegra194-cpufreq module build failure caused by __cpu_logical_map
   not being exported.

 - Improve fixed_addresses comment regarding the fixmap buffer sizes.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Fix __cpu_logical_map undefined issue
  arm64/fixmap: make notes of fixed_addresses more precisely
This commit is contained in:
Linus Torvalds 2020-08-08 14:16:12 -07:00
commit 06a81c1c7d
4 changed files with 19 additions and 9 deletions
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7
arch/arm64/include/asm/fixmap.h
View File

@ -28,10 +28,9 @@
* compile time, but to set the physical address only
* in the boot process.
*
* These 'compile-time allocated' memory buffers are
* page-sized. Use set_fixmap(idx,phys) to associate
* physical memory with fixmap indices.
*
* Each enum increment in these 'compile-time allocated'
* memory buffers is page-sized. Use set_fixmap(idx,phys)
* to associate physical memory with a fixmap index.
*/
enum fixed_addresses {
FIX_HOLE,

7
arch/arm64/include/asm/smp.h
View File

@ -46,7 +46,12 @@ DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
* Logical CPU mapping.
*/
extern u64 __cpu_logical_map[NR_CPUS];
#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
extern u64 cpu_logical_map(int cpu);
static inline void set_cpu_logical_map(int cpu, u64 hwid)
{
__cpu_logical_map[cpu] = hwid;
}
struct seq_file;

8
arch/arm64/kernel/setup.c
View File

@ -85,7 +85,7 @@ u64 __cacheline_aligned boot_args[4];
void __init smp_setup_processor_id(void)
{
u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
cpu_logical_map(0) = mpidr;
set_cpu_logical_map(0, mpidr);
/*
* clear __my_cpu_offset on boot CPU to avoid hang caused by
@ -276,6 +276,12 @@ arch_initcall(reserve_memblock_reserved_regions);
u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
u64 cpu_logical_map(int cpu)
{
return __cpu_logical_map[cpu];
}
EXPORT_SYMBOL_GPL(cpu_logical_map);
void __init __no_sanitize_address setup_arch(char **cmdline_p)
{
init_mm.start_code = (unsigned long) _text;

6
arch/arm64/kernel/smp.c
View File

@ -566,7 +566,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
return;
/* map the logical cpu id to cpu MPIDR */
cpu_logical_map(cpu_count) = hwid;
set_cpu_logical_map(cpu_count, hwid);
cpu_madt_gicc[cpu_count] = *processor;
@ -680,7 +680,7 @@ static void __init of_parse_and_init_cpus(void)
goto next;
pr_debug("cpu logical map 0x%llx\n", hwid);
cpu_logical_map(cpu_count) = hwid;
set_cpu_logical_map(cpu_count, hwid);
early_map_cpu_to_node(cpu_count, of_node_to_nid(dn));
next:
@ -721,7 +721,7 @@ void __init smp_init_cpus(void)
for (i = 1; i < nr_cpu_ids; i++) {
if (cpu_logical_map(i) != INVALID_HWID) {
if (smp_cpu_setup(i))
cpu_logical_map(i) = INVALID_HWID;
set_cpu_logical_map(i, INVALID_HWID);
}
}
}