From: Pingfan Liu <piliu@xxxxxxxxxx>
This patch aims to mark all the arrays which size is decided by
nr_cpu_ids or num_possible_cpus(). Later if a hole is allowed in
cpu_possible_mask, the corresponding array should extend to hold the
last bit number in cpu_possible_mask.
Signed-off-by: Pingfan Liu <piliu@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Mahesh Salgaonkar <mahesh@xxxxxxxxxxxxx>
Cc: Wen Xiong <wenxiong@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Ming Lei <ming.lei@xxxxxxxxxx>
Cc: Sourabh Jain <sourabhjain@xxxxxxxxxxxxx>
Cc: Hari Bathini <hbathini@xxxxxxxxxxxxx>
Cc: kexec@xxxxxxxxxxxxxxxxxxx
To: linuxppc-dev@xxxxxxxxxxxxxxxx
---
arch/powerpc/include/asm/paca.h | 2 ++
arch/powerpc/kernel/paca.c | 8 ++++----
arch/powerpc/kernel/setup-common.c | 2 +-
arch/powerpc/kernel/smp.c | 3 ++-
4 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index e667d455ecb4..a577d98dd0d8 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -299,5 +299,7 @@ static inline void free_unused_pacas(void) { }
#endif /* CONFIG_PPC64 */
+extern int paca_last_cpu_num;
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PACA_H */
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 760f371cf096..840c74dd17d6 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -236,15 +236,15 @@ void setup_paca(struct paca_struct *new_paca)
}
-static int __initdata paca_nr_cpu_ids;
+int __initdata paca_last_cpu_num;
static int __initdata paca_ptrs_size;
static int __initdata paca_struct_size;
void __init allocate_paca_ptrs(void)
{
- paca_nr_cpu_ids = nr_cpu_ids;
+ paca_last_cpu_num = nr_cpu_ids;
- paca_ptrs_size = sizeof(struct paca_struct *) * nr_cpu_ids;
+ paca_ptrs_size = sizeof(struct paca_struct *) * paca_last_cpu_num;
paca_ptrs = memblock_alloc_raw(paca_ptrs_size, SMP_CACHE_BYTES);
if (!paca_ptrs)
panic("Failed to allocate %d bytes for paca pointers\n",
@@ -258,7 +258,7 @@ void __init allocate_paca(int cpu)
u64 limit;
struct paca_struct *paca;
- BUG_ON(cpu >= paca_nr_cpu_ids);
+ BUG_ON(cpu >= paca_last_cpu_num);
#ifdef CONFIG_PPC_BOOK3S_64
/*
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 2f1026fba00d..f9f5f313abf0 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -453,7 +453,7 @@ void __init smp_setup_cpu_maps(void)
DBG("smp_setup_cpu_maps()\n");
- cpu_to_phys_id = memblock_alloc(nr_cpu_ids * sizeof(u32),
+ cpu_to_phys_id = memblock_alloc(paca_last_cpu_num * sizeof(u32),
__alignof__(u32));
if (!cpu_to_phys_id)
panic("%s: Failed to allocate %zu bytes align=0x%zx\n",
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 5826f5108a12..6fefe22fd118 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1140,7 +1140,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
}
if (cpu_to_chip_id(boot_cpuid) != -1) {
- int idx = DIV_ROUND_UP(num_possible_cpus(), threads_per_core);
+ int idx = DIV_ROUND_UP(cpumask_last(cpu_possible_mask),
+ threads_per_core);
/*
* All threads of a core will all belong to the same core,
--
2.31.1
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