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Merge branch 'for-5.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu

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Pull percpu fix and cleanup from Dennis Zhou:
 "A fix for a Wshadow warning in the asm-generic percpu macros came in
  and then I tacked on the removal of flexible array initializers in the
  percpu allocator"

* 'for-5.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  percpu: convert flexible array initializers to use struct_size()
  asm-generic: percpu: avoid Wshadow warning
This commit is contained in:
Linus Torvalds 2020-11-15 08:57:19 -08:00
commit a50cf15906
2 changed files with 13 additions and 13 deletions
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18
include/asm-generic/percpu.h
View File

@ -114,21 +114,21 @@ do { \
#define __this_cpu_generic_read_nopreempt(pcp) \
({ \
typeof(pcp) __ret; \
typeof(pcp) ___ret; \
preempt_disable_notrace(); \
__ret = READ_ONCE(*raw_cpu_ptr(&(pcp))); \
___ret = READ_ONCE(*raw_cpu_ptr(&(pcp))); \
preempt_enable_notrace(); \
__ret; \
___ret; \
})
#define __this_cpu_generic_read_noirq(pcp) \
({ \
typeof(pcp) __ret; \
unsigned long __flags; \
raw_local_irq_save(__flags); \
__ret = raw_cpu_generic_read(pcp); \
raw_local_irq_restore(__flags); \
__ret; \
typeof(pcp) ___ret; \
unsigned long ___flags; \
raw_local_irq_save(___flags); \
___ret = raw_cpu_generic_read(pcp); \
raw_local_irq_restore(___flags); \
___ret; \
})
#define this_cpu_generic_read(pcp) \

8
mm/percpu.c
View File

@ -1315,8 +1315,8 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
region_size = ALIGN(start_offset + map_size, lcm_align);
/* allocate chunk */
alloc_size = sizeof(struct pcpu_chunk) +
BITS_TO_LONGS(region_size >> PAGE_SHIFT) * sizeof(unsigned long);
alloc_size = struct_size(chunk, populated,
BITS_TO_LONGS(region_size >> PAGE_SHIFT));
chunk = memblock_alloc(alloc_size, SMP_CACHE_BYTES);
if (!chunk)
panic("%s: Failed to allocate %zu bytes\n", __func__,
@ -2521,8 +2521,8 @@ void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
pcpu_unit_pages = ai->unit_size >> PAGE_SHIFT;
pcpu_unit_size = pcpu_unit_pages << PAGE_SHIFT;
pcpu_atom_size = ai->atom_size;
pcpu_chunk_struct_size = sizeof(struct pcpu_chunk) +
BITS_TO_LONGS(pcpu_unit_pages) * sizeof(unsigned long);
pcpu_chunk_struct_size = struct_size(chunk, populated,
BITS_TO_LONGS(pcpu_unit_pages));
pcpu_stats_save_ai(ai);