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ia64: remove custom __early_pfn_to_nid()

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The ia64 implementation of __early_pfn_to_nid() essentially relies on the
same data as the generic implementation.

The correspondence between memory ranges and nodes is set in memblock
during early memory initialization in register_active_ranges() function.

The initialization of sparsemem that requires early_pfn_to_nid() happens
later and it can use the memblock information like the other architectures.

Link: https://lkml.kernel.org/r/20201101170454.9567-3-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Meelis Roos <mroos@linux.ee>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2020-12-14 19:09:32 -08:00 committed by Linus Torvalds
parent 36d40290c8
commit 03e92a5e09
5 changed files with 12 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/ia64/Kconfig
View File

@ -342,9 +342,6 @@ config HOLES_IN_ZONE
bool
default y if VIRTUAL_MEM_MAP
config HAVE_ARCH_EARLY_PFN_TO_NID
def_bool NUMA && SPARSEMEM
config HAVE_ARCH_NODEDATA_EXTENSION
def_bool y
depends on NUMA

30
arch/ia64/mm/numa.c
View File

@ -58,36 +58,6 @@ paddr_to_nid(unsigned long paddr)
EXPORT_SYMBOL(paddr_to_nid);
#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
/*
* Because of holes evaluate on section limits.
* If the section of memory exists, then return the node where the section
* resides. Otherwise return node 0 as the default. This is used by
* SPARSEMEM to allocate the SPARSEMEM sectionmap on the NUMA node where
* the section resides.
*/
int __meminit __early_pfn_to_nid(unsigned long pfn,
struct mminit_pfnnid_cache *state)
{
int i, section = pfn >> PFN_SECTION_SHIFT, ssec, esec;
if (section >= state->last_start && section < state->last_end)
return state->last_nid;
for (i = 0; i < num_node_memblks; i++) {
ssec = node_memblk[i].start_paddr >> PA_SECTION_SHIFT;
esec = (node_memblk[i].start_paddr + node_memblk[i].size +
((1L << PA_SECTION_SHIFT) - 1)) >> PA_SECTION_SHIFT;
if (section >= ssec && section < esec) {
state->last_start = ssec;
state->last_end = esec;
state->last_nid = node_memblk[i].nid;
return node_memblk[i].nid;
}
}
return -1;
}
void numa_clear_node(int cpu)
{
unmap_cpu_from_node(cpu, NUMA_NO_NODE);

3
include/linux/mm.h
View File

@ -2434,9 +2434,6 @@ static inline int early_pfn_to_nid(unsigned long pfn)
#else
/* please see mm/page_alloc.c */
extern int __meminit early_pfn_to_nid(unsigned long pfn);
/* there is a per-arch backend function. */
extern int __meminit __early_pfn_to_nid(unsigned long pfn,
struct mminit_pfnnid_cache *state);
#endif
extern void set_dma_reserve(unsigned long new_dma_reserve);

11
include/linux/mmzone.h
View File

@ -1428,17 +1428,6 @@ void sparse_init(void);
#define subsection_map_init(_pfn, _nr_pages) do {} while (0)
#endif /* CONFIG_SPARSEMEM */
/*
* During memory init memblocks map pfns to nids. The search is expensive and
* this caches recent lookups. The implementation of __early_pfn_to_nid
* may treat start/end as pfns or sections.
*/
struct mminit_pfnnid_cache {
unsigned long last_start;
unsigned long last_end;
int last_nid;
};
/*
* If it is possible to have holes within a MAX_ORDER_NR_PAGES, then we
* need to check pfn validity within that MAX_ORDER_NR_PAGES block.

16
mm/page_alloc.c
View File

@ -1559,14 +1559,23 @@ void __free_pages_core(struct page *page, unsigned int order)
#ifdef CONFIG_NEED_MULTIPLE_NODES
static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
/*
* During memory init memblocks map pfns to nids. The search is expensive and
* this caches recent lookups. The implementation of __early_pfn_to_nid
* treats start/end as pfns.
*/
struct mminit_pfnnid_cache {
unsigned long last_start;
unsigned long last_end;
int last_nid;
};
#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
/*
* Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
*/
int __meminit __early_pfn_to_nid(unsigned long pfn,
static int __meminit __early_pfn_to_nid(unsigned long pfn,
struct mminit_pfnnid_cache *state)
{
unsigned long start_pfn, end_pfn;
@ -1584,7 +1593,6 @@ int __meminit __early_pfn_to_nid(unsigned long pfn,
return nid;
}
#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
int __meminit early_pfn_to_nid(unsigned long pfn)
{