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| author | David Hildenbrand <david@redhat.com> | 2019-09-23 15:35:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-24 15:54:09 -0700 |
| commit | b6c88d3b9d38f9448e0fcf44847a075ea81d5ca2 (patch) | |
| tree | ba7ccb02002fd017c8632a0698032c598ef090e7 /include/linux/memory.h | |
| parent | 902ce63b337381092ff865f542e854ff3d0ebe2b (diff) | |
| download | lwn-b6c88d3b9d38f9448e0fcf44847a075ea81d5ca2.tar.gz lwn-b6c88d3b9d38f9448e0fcf44847a075ea81d5ca2.zip | |
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 'include/linux/memory.h')
| -rw-r--r-- | include/linux/memory.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/memory.h b/include/linux/memory.h index b3d9df060626..0ebb105eb261 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -25,7 +25,6 @@ struct memory_block { unsigned long start_section_nr; - unsigned long end_section_nr; unsigned long state; /* serialized by the dev->lock */ int section_count; /* serialized by mem_sysfs_mutex */ int online_type; /* for passing data to online routine */ |