Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
On 04/21/20 at 11:49am, Mike Rapoport wrote:
> 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
> > >
> > > 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
> > > ---
> > > 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.
OK, it's fine to me.
Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
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
> >
> > 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
> > ---
> > 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
> > #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
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, _pfn, _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, _pfn, _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
Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
On Tue, Apr 21, 2020 at 11:31:14AM +0800, Baoquan He wrote:
> On 04/12/20 at 10:48pm, Mike Rapoport wrote:
> > From: Mike Rapoport
> >
> > 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
> > ---
> > include/linux/mm.h | 4 ++--
> > include/linux/mmzone.h | 9
> > mm/page_alloc.c| 51 +-
> > 3 files changed, 27 insertions(+), 37 deletions(-)
...
> > 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
>
> Here it's apparently removing CONFIG_HAVE_MEMBLOCK_NODE_MAP too early,
> it should be done in patch 3, and its #end is kept there. I just found
> it when I almost became dizzy in reviewing patch 3.
Right, thanks for catching!
> > -#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
> > -
--
Sincerely yours,
Mike.
Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
On 04/12/20 at 10:48pm, Mike Rapoport wrote:
> From: Mike Rapoport
>
> 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
> ---
> 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;
> }
> #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
> #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)
>
> static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
>
> +#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, _pfn, _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
Here it's apparently removing CONFIG_HAVE_MEMBLOCK_NODE_MAP too early,
it should be done in patch 3, and its #end is kept there. I just found
it when I almost became dizzy in reviewing patch 3.
> -#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, _pfn, _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
>
Re: [PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
On 04/12/20 at 10:48pm, Mike Rapoport wrote:
> From: Mike Rapoport
>
> 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
> ---
> 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.
> #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
> #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.
Otherwise, this patch looks good to me.
Reviewed-by: Baoquan He
> +
> +/*
> + * 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, _pfn, _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, _pfn, _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
>
[PATCH 02/21] mm: make early_pfn_to_nid() and related defintions close to each other
From: Mike Rapoport
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
---
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;
}
#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
#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)
static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
+#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, _pfn, _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, _pfn, _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
