commit 9d1d887d785b4fe0590bd3c5e71acaa3908044e2 upstream.
Let's just warn in case a section is not valid instead of failing to remove somewhere in the middle of the process, returning an error that will be mostly ignored by callers.
Link: http://lkml.kernel.org/r/20190409100148.24703-4-david@redhat.com Signed-off-by: David Hildenbrand david@redhat.com Reviewed-by: Oscar Salvador osalvador@suse.de Cc: Michal Hocko mhocko@suse.com Cc: David Hildenbrand david@redhat.com Cc: Pavel Tatashin pasha.tatashin@soleen.com Cc: Qian Cai cai@lca.pw Cc: Wei Yang richard.weiyang@gmail.com Cc: Arun KS arunks@codeaurora.org Cc: Mathieu Malaterre malat@debian.org Cc: Andrew Banman andrew.banman@hpe.com Cc: Andy Lutomirski luto@kernel.org Cc: Benjamin Herrenschmidt benh@kernel.crashing.org Cc: Borislav Petkov bp@alien8.de Cc: Christophe Leroy christophe.leroy@c-s.fr Cc: Dave Hansen dave.hansen@linux.intel.com Cc: Fenghua Yu fenghua.yu@intel.com Cc: Geert Uytterhoeven geert@linux-m68k.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Heiko Carstens heiko.carstens@de.ibm.com Cc: "H. Peter Anvin" hpa@zytor.com Cc: Ingo Molnar mingo@kernel.org Cc: Ingo Molnar mingo@redhat.com Cc: Joonsoo Kim iamjoonsoo.kim@lge.com Cc: "Kirill A. Shutemov" kirill.shutemov@linux.intel.com Cc: Martin Schwidefsky schwidefsky@de.ibm.com Cc: Masahiro Yamada yamada.masahiro@socionext.com Cc: Michael Ellerman mpe@ellerman.id.au Cc: Mike Rapoport rppt@linux.ibm.com Cc: Mike Travis mike.travis@hpe.com Cc: Nicholas Piggin npiggin@gmail.com Cc: Oscar Salvador osalvador@suse.com Cc: Paul Mackerras paulus@samba.org Cc: Peter Zijlstra peterz@infradead.org Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rich Felker dalias@libc.org Cc: Rob Herring robh@kernel.org Cc: Stefan Agner stefan@agner.ch Cc: Thomas Gleixner tglx@linutronix.de Cc: Tony Luck tony.luck@intel.com Cc: Vasily Gorbik gor@linux.ibm.com Cc: Yoshinori Sato ysato@users.sourceforge.jp Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: David Hildenbrand david@redhat.com --- mm/memory_hotplug.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 42c5bc371ffe..a9fcae50a33a 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -478,15 +478,15 @@ static void __remove_zone(struct zone *zone, unsigned long start_pfn) pgdat_resize_unlock(zone->zone_pgdat, &flags); }
-static int __remove_section(struct zone *zone, struct mem_section *ms, - unsigned long map_offset, struct vmem_altmap *altmap) +static void __remove_section(struct zone *zone, struct mem_section *ms, + unsigned long map_offset, + struct vmem_altmap *altmap) { unsigned long start_pfn; int scn_nr; - int ret = -EINVAL;
- if (!valid_section(ms)) - return ret; + if (WARN_ON_ONCE(!valid_section(ms))) + return;
unregister_memory_section(ms);
@@ -495,7 +495,6 @@ static int __remove_section(struct zone *zone, struct mem_section *ms, __remove_zone(zone, start_pfn);
sparse_remove_one_section(zone, ms, map_offset, altmap); - return 0; }
/** @@ -515,7 +514,7 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn, { unsigned long i; unsigned long map_offset = 0; - int sections_to_remove, ret = 0; + int sections_to_remove;
/* In the ZONE_DEVICE case device driver owns the memory region */ if (is_dev_zone(zone)) { @@ -536,16 +535,13 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn, unsigned long pfn = phys_start_pfn + i*PAGES_PER_SECTION;
cond_resched(); - ret = __remove_section(zone, __pfn_to_section(pfn), map_offset, - altmap); + __remove_section(zone, __pfn_to_section(pfn), map_offset, + altmap); map_offset = 0; - if (ret) - break; }
set_zone_contiguous(zone); - - return ret; + return 0; } #endif /* CONFIG_MEMORY_HOTREMOVE */