David Hildenbrand 68c3a6ac65 drivers/base/memory.c: drop section_count ... Patch series "mm: drop superfluous section checks when onlining/offlining". Let's drop some superfluous section checks on the onlining/offlining path. This patch (of 3): Since commit c5e79ef561 ("mm/memory_hotplug.c: don't allow to online/offline memory blocks with holes") we have a generic check in offline_pages() that disallows offlining memory blocks with holes. Memory blocks with missing sections are just another variant of these type of blocks. We can stop checking (and especially storing) present sections. A proper error message is now printed why offlining failed. section_count was initially introduced in commit 0768121597 ("Driver core: Add section count to memory_block struct") in order to detect when it is okay to remove a memory block. It was used in commit 26bbe7ef6d ("drivers/base/memory.c: prohibit offlining of memory blocks with missing sections") to disallow offlining memory blocks with missing sections. As we refactored creation/removal of memory devices and have a proper check for holes in place, we can drop the section_count. This also removes a leftover comment regarding the mem_sysfs_mutex, which was removed in commit 848e19ad3c ("drivers/base/memory.c: drop the mem_sysfs_mutex"). Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Link: http://lkml.kernel.org/r/20200127110424.5757-2-david@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-04-07 10:43:40 -07:00
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acpi	Additional ACPI updates for 5.7-rc1	2020-04-06 10:35:06 -07:00
asm-generic	userfaultfd: wp: add pmd_swp_*uffd_wp() helpers	2020-04-07 10:43:39 -07:00
clocksource
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2020-04-01 14:47:40 -07:00
drm	Merge branch 'ttm-transhuge' of git://people.freedesktop.org/~thomash/linux into drm-next	2020-04-03 09:07:49 +10:00
dt-bindings	There's not much to see in the core framework this time around. Instead the	2020-04-05 10:43:32 -07:00
keys	KEYS: Don't write out to userspace while holding key semaphore	2020-03-29 12:40:41 +01:00
kunit	kunit: subtests should be indented 4 spaces according to TAP	2020-03-26 14:08:41 -06:00
kvm
linux	drivers/base/memory.c: drop section_count	2020-04-07 10:43:40 -07:00
math-emu
media
misc
net	9p pull request for inclusion in 5.7	2020-04-06 08:46:59 -07:00
pcmcia
ras
rdma	IB/mlx5: Expose UAR object and its alloc/destroy commands	2020-03-27 12:59:04 -03:00
scsi	SCSI misc on 20200402	2020-04-02 17:03:53 -07:00
soc	ARM: driver updates	2020-04-03 15:05:35 -07:00
sound	ASoC: Updates for v5.7	2020-03-30 13:43:00 +02:00
target	scsi: target: fix hang when multiple threads try to destroy the same iscsi session	2020-03-26 21:47:47 -04:00
trace	khugepaged: skip collapse if uffd-wp detected	2020-04-07 10:43:39 -07:00
uapi	userfaultfd: wp: enabled write protection in userfaultfd API	2020-04-07 10:43:39 -07:00
vdso
video
xen	xen/xenbus: remove unused xenbus_map_ring()	2020-03-30 17:30:46 +02:00