On Tue, Apr 21, 2020 at 10:24:35AM +0800, Baoquan He wrote: > On 04/12/20 at 10:48pm, Mike Rapoport wrote: > > From: Mike Rapoport <rppt****@linux*****> > > > > The early_pfn_to_nid() and it's helper __early_pfn_to_nid() are spread > > around include/linux/mm.h, include/linux/mmzone.h and mm/page_alloc.c. > > > > Drop unused stub for __early_pfn_to_nid() and move its actual generic > > implementation close to its users. > > > > Signed-off-by: Mike Rapoport <rppt****@linux*****> > > --- > > include/linux/mm.h | 4 ++-- > > include/linux/mmzone.h | 9 -------- > > mm/page_alloc.c | 51 +++++++++++++++++++++--------------------- > > 3 files changed, 27 insertions(+), 37 deletions(-) > > > > diff --git a/include/linux/mm.h b/include/linux/mm.h > > index 5a323422d783..a404026d14d4 100644 > > --- a/include/linux/mm.h > > +++ b/include/linux/mm.h > > @@ -2388,9 +2388,9 @@ extern void sparse_memory_present_with_active_regions(int nid); > > > > #if !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) && \ > > !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) > > -static inline int __early_pfn_to_nid(unsigned long pfn, > > - struct mminit_pfnnid_cache *state) > > +static inline int early_pfn_to_nid(unsigned long pfn) > > { > > + BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA)); > > return 0; > > } > > It's better to make a separate patch to drop __early_pfn_to_nid() here. Not sure it's really worth it. This patch anyway only moves the code around without any actual changes. > > #else > > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > > index 1b9de7d220fb..7b5b6eba402f 100644 > > --- a/include/linux/mmzone.h > > +++ b/include/linux/mmzone.h > > @@ -1078,15 +1078,6 @@ static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist, > > #include <asm/sparsemem.h> > > #endif > > > > -#if !defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) && \ > > - !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) > > -static inline unsigned long early_pfn_to_nid(unsigned long pfn) > > -{ > > - BUILD_BUG_ON(IS_ENABLED(CONFIG_NUMA)); > > - return 0; > > -} > > -#endif > > - > > #ifdef CONFIG_FLATMEM > > #define pfn_to_nid(pfn) (0) > > #endif > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > > index 0d012eda1694..1ac775bfc9cf 100644 > > --- a/mm/page_alloc.c > > +++ b/mm/page_alloc.c > > @@ -1504,6 +1504,31 @@ void __free_pages_core(struct page *page, unsigned int order) > > #if defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) || \ > defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) > > This is the upper layer of ifdeffery scope. > > > > static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata; > > > > +#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID > > Moving __early_pfn_to_nid() here makes the upper layer of ifdeferry > scope a little werid. But seems no better way to optimize it. It gets a bit better after patch 3 :) > Otherwise, this patch looks good to me. > > Reviewed-by: Baoquan He <bhe****@redha*****> Thanks! > > + > > +/* > > + * Required by SPARSEMEM. Given a PFN, return what node the PFN is on. > > + */ > > +int __meminit __early_pfn_to_nid(unsigned long pfn, > > + struct mminit_pfnnid_cache *state) > > +{ > > + unsigned long start_pfn, end_pfn; > > + int nid; > > + > > + if (state->last_start <= pfn && pfn < state->last_end) > > + return state->last_nid; > > + > > + nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn); > > + if (nid != NUMA_NO_NODE) { > > + state->last_start = start_pfn; > > + state->last_end = end_pfn; > > + state->last_nid = nid; > > + } > > + > > + return nid; > > +} > > +#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */ > > + > > int __meminit early_pfn_to_nid(unsigned long pfn) > > { > > static DEFINE_SPINLOCK(early_pfn_lock); > > @@ -6298,32 +6323,6 @@ void __meminit init_currently_empty_zone(struct zone *zone, > > zone->initialized = 1; > > } > > > > -#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP > > -#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID > > - > > -/* > > - * Required by SPARSEMEM. Given a PFN, return what node the PFN is on. > > - */ > > -int __meminit __early_pfn_to_nid(unsigned long pfn, > > - struct mminit_pfnnid_cache *state) > > -{ > > - unsigned long start_pfn, end_pfn; > > - int nid; > > - > > - if (state->last_start <= pfn && pfn < state->last_end) > > - return state->last_nid; > > - > > - nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn); > > - if (nid != NUMA_NO_NODE) { > > - state->last_start = start_pfn; > > - state->last_end = end_pfn; > > - state->last_nid = nid; > > - } > > - > > - return nid; > > -} > > -#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */ > > - > > /** > > * free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range > > * @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed. > > -- > > 2.25.1 > > > -- Sincerely yours, Mike.
Fork