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authorDavid Hildenbrand <david@redhat.com>2019-09-24 01:35:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-25 01:54:09 +0300
commitb6c88d3b9d38f9448e0fcf44847a075ea81d5ca2 (patch)
treeba7ccb02002fd017c8632a0698032c598ef090e7 /drivers/base/memory.c
parent902ce63b337381092ff865f542e854ff3d0ebe2b (diff)
downloadlinux-b6c88d3b9d38f9448e0fcf44847a075ea81d5ca2.tar.xz
drivers/base/memory.c: don't store end_section_nr in memory blocks
Each memory block spans the same amount of sections/pages/bytes. The size is determined before the first memory block is created. No need to store what we can easily calculate - and the calculations even look simpler now. Michal brought up the idea of variable-sized memory blocks. However, if we ever implement something like this, we will need an API compatibility switch and reworks at various places (most code assumes a fixed memory block size). So let's cleanup what we have right now. While at it, fix the variable naming in register_mem_sect_under_node() - we no longer talk about a single section. Link: http://lkml.kernel.org/r/20190809110200.2746-1-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Oscar Salvador <osalvador@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base/memory.c')
-rw-r--r--drivers/base/memory.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 763154c82eb3..6bea4f3f8040 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -656,7 +656,6 @@ static int init_memory_block(struct memory_block **memory,
return -ENOMEM;
mem->start_section_nr = block_id * sections_per_block;
- mem->end_section_nr = mem->start_section_nr + sections_per_block - 1;
mem->state = state;
start_pfn = section_nr_to_pfn(mem->start_section_nr);
mem->phys_device = arch_get_memory_phys_device(start_pfn);