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| author |   David Hildenbrand <david@redhat.com> | 2024-12-03 10:47:32 +0100 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2025-01-13 22:40:45 -0800 |
| commit | 1fb4315b0c6f97c7ddc8aff0fe13aa442a69efc1 (patch) | |
| tree | a35e3ddab824fd928814d5879f819f238fa862db /arch | |
| parent | mm/page_alloc: forward the gfp flags from alloc_contig_range() to post_alloc_hook() (diff) | |
| download | wireguard-linux-1fb4315b0c6f97c7ddc8aff0fe13aa442a69efc1.tar.xz wireguard-linux-1fb4315b0c6f97c7ddc8aff0fe13aa442a69efc1.zip | |
powernv/memtrace: use __GFP_ZERO with alloc_contig_pages()
alloc_contig_pages()->alloc_contig_range() now supports __GFP_ZERO, so
let's use that instead to resolve our TODO.
Link: https://lkml.kernel.org/r/20241203094732.200195-7-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Naveen N Rao <naveen@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/powernv/memtrace.c | 31 |
1 files changed, 6 insertions, 25 deletions
diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c index 877720c64515..4ac9808e55a4 100644 --- a/arch/powerpc/platforms/powernv/memtrace.c +++ b/arch/powerpc/platforms/powernv/memtrace.c @@ -88,26 +88,6 @@ static void flush_dcache_range_chunked(unsigned long start, unsigned long stop, } } -static void memtrace_clear_range(unsigned long start_pfn, - unsigned long nr_pages) -{ - unsigned long pfn; - - /* As HIGHMEM does not apply, use clear_page() directly. */ - for (pfn = start_pfn; pfn < start_pfn + nr_pages; pfn++) { - if (IS_ALIGNED(pfn, PAGES_PER_SECTION)) - cond_resched(); - clear_page(__va(PFN_PHYS(pfn))); - } - /* - * Before we go ahead and use this range as cache inhibited range - * flush the cache. - */ - flush_dcache_range_chunked((unsigned long)pfn_to_kaddr(start_pfn), - (unsigned long)pfn_to_kaddr(start_pfn + nr_pages), - FLUSH_CHUNK_SIZE); -} - static u64 memtrace_alloc_node(u32 nid, u64 size) { const unsigned long nr_pages = PHYS_PFN(size); @@ -119,17 +99,18 @@ static u64 memtrace_alloc_node(u32 nid, u64 size) * by alloc_contig_pages(). */ page = alloc_contig_pages(nr_pages, GFP_KERNEL | __GFP_THISNODE | - __GFP_NOWARN, nid, NULL); + __GFP_NOWARN | __GFP_ZERO, nid, NULL); if (!page) return 0; start_pfn = page_to_pfn(page); /* - * Clear the range while we still have a linear mapping. - * - * TODO: use __GFP_ZERO with alloc_contig_pages() once supported. + * Before we go ahead and use this range as cache inhibited range + * flush the cache. */ - memtrace_clear_range(start_pfn, nr_pages); + flush_dcache_range_chunked((unsigned long)pfn_to_kaddr(start_pfn), + (unsigned long)pfn_to_kaddr(start_pfn + nr_pages), + FLUSH_CHUNK_SIZE); /* * Set pages PageOffline(), to indicate that nobody (e.g., hibernation, |