| Message ID | 1522636236-12625-4-git-send-email-hejianet@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 2 April 2018 at 04:30, Jia He <hejianet@gmail.com> wrote: > This api is the preparation for further optimizing early_pfn_valid > Please add more explanatation here of what it is you are doing and why. > Signed-off-by: Jia He <jia.he@hxt-semitech.com> > --- > include/linux/memblock.h | 2 ++ > mm/memblock.c | 9 +++++++++ > 2 files changed, 11 insertions(+) > > diff --git a/include/linux/memblock.h b/include/linux/memblock.h > index 0257aee..a0127b3 100644 > --- a/include/linux/memblock.h > +++ b/include/linux/memblock.h > @@ -203,6 +203,8 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, > i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) > #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ > > +int memblock_search_pfn_regions(unsigned long pfn); > + > /** > * for_each_free_mem_range - iterate through free memblock areas > * @i: u64 used as loop variable > diff --git a/mm/memblock.c b/mm/memblock.c > index ba7c878..0f4004c 100644 > --- a/mm/memblock.c > +++ b/mm/memblock.c > @@ -1617,6 +1617,15 @@ static int __init_memblock memblock_search(struct memblock_type *type, phys_addr > return -1; > } > > +/* search memblock with the input pfn, return the region idx */ > +int __init_memblock memblock_search_pfn_regions(unsigned long pfn) > +{ > + struct memblock_type *type = &memblock.memory; > + int mid = memblock_search(type, PFN_PHYS(pfn)); > + > + return mid; > +} > + > bool __init memblock_is_reserved(phys_addr_t addr) > { > return memblock_search(&memblock.reserved, addr) != -1; > -- > 2.7.4 >
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 0257aee..a0127b3 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -203,6 +203,8 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ +int memblock_search_pfn_regions(unsigned long pfn); + /** * for_each_free_mem_range - iterate through free memblock areas * @i: u64 used as loop variable diff --git a/mm/memblock.c b/mm/memblock.c index ba7c878..0f4004c 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1617,6 +1617,15 @@ static int __init_memblock memblock_search(struct memblock_type *type, phys_addr return -1; } +/* search memblock with the input pfn, return the region idx */ +int __init_memblock memblock_search_pfn_regions(unsigned long pfn) +{ + struct memblock_type *type = &memblock.memory; + int mid = memblock_search(type, PFN_PHYS(pfn)); + + return mid; +} + bool __init memblock_is_reserved(phys_addr_t addr) { return memblock_search(&memblock.reserved, addr) != -1;
This api is the preparation for further optimizing early_pfn_valid Signed-off-by: Jia He <jia.he@hxt-semitech.com> --- include/linux/memblock.h | 2 ++ mm/memblock.c | 9 +++++++++ 2 files changed, 11 insertions(+)