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| author | David Hildenbrand <david@redhat.com> | 2020-10-15 20:08:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-16 11:11:17 -0700 |
| commit | 3fa0c7c79d2499af390fbfaf60c94753e7f630f5 (patch) | |
| tree | 2bbf089d23a01888bc8199bf03c92f0cf4579b89 | |
| parent | ea15153c3d46777be28d84c1484ad80a9e119234 (diff) | |
| download | linux-3fa0c7c79d2499af390fbfaf60c94753e7f630f5.tar.bz2 | |
mm/page_isolation: simplify return value of start_isolate_page_range()
Callers no longer need the number of isolated pageblocks. Let's simplify.
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Charan Teja Reddy <charante@codeaurora.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michel Lespinasse <walken@google.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200819175957.28465-7-david@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memory_hotplug.c | 2 | ||||
| -rw-r--r-- | mm/page_alloc.c | 2 | ||||
| -rw-r--r-- | mm/page_isolation.c | 7 |
3 files changed, 4 insertions, 7 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 90524446aafd..d61e5be6d965 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1514,7 +1514,7 @@ int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages) ret = start_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE, MEMORY_OFFLINE | REPORT_FAILURE); - if (ret < 0) { + if (ret) { reason = "failure to isolate range"; goto failed_removal; } diff --git a/mm/page_alloc.c b/mm/page_alloc.c index acc04ca1831d..19807b688171 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -8468,7 +8468,7 @@ int alloc_contig_range(unsigned long start, unsigned long end, ret = start_isolate_page_range(pfn_max_align_down(start), pfn_max_align_up(end), migratetype, 0); - if (ret < 0) + if (ret) return ret; /* diff --git a/mm/page_isolation.c b/mm/page_isolation.c index aa94afb63823..abfe26ad59fd 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -173,8 +173,7 @@ __first_valid_page(unsigned long pfn, unsigned long nr_pages) * (e.g. __offline_pages will need to call it after check for isolated range for * a next retry). * - * Return: the number of isolated pageblocks on success and -EBUSY if any part - * of range cannot be isolated. + * Return: 0 on success and -EBUSY if any part of range cannot be isolated. */ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, unsigned migratetype, int flags) @@ -182,7 +181,6 @@ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, unsigned long pfn; unsigned long undo_pfn; struct page *page; - int nr_isolate_pageblock = 0; BUG_ON(!IS_ALIGNED(start_pfn, pageblock_nr_pages)); BUG_ON(!IS_ALIGNED(end_pfn, pageblock_nr_pages)); @@ -196,10 +194,9 @@ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, undo_pfn = pfn; goto undo; } - nr_isolate_pageblock++; } } - return nr_isolate_pageblock; + return 0; undo: for (pfn = start_pfn; pfn < undo_pfn; |