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authorMike Rapoport <rppt@linux.ibm.com>2020-08-07 08:24:02 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 20:33:27 +0200
commitc89ab04febf97d2db8ca4ef8e2866fadc474351b (patch)
tree99a12f54aa9cabcdd0b1c0a91098cbbc29b04a3b /Documentation/vm
parentmm/sparse: only sub-section aligned range would be populated (diff)
downloadlinux-c89ab04febf97d2db8ca4ef8e2866fadc474351b.tar.xz
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mm/sparse: cleanup the code surrounding memory_present()
After removal of CONFIG_HAVE_MEMBLOCK_NODE_MAP we have two equivalent functions that call memory_present() for each region in memblock.memory: sparse_memory_present_with_active_regions() and membocks_present(). Moreover, all architectures have a call to either of these functions preceding the call to sparse_init() and in the most cases they are called one after the other. Mark the regions from memblock.memory as present during sparce_init() by making sparse_init() call memblocks_present(), make memblocks_present() and memory_present() functions static and remove redundant sparse_memory_present_with_active_regions() function. Also remove no longer required HAVE_MEMORY_PRESENT configuration option. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200712083130.22919-1-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm')
-rw-r--r--Documentation/vm/memory-model.rst7
1 files changed, 2 insertions, 5 deletions
diff --git a/Documentation/vm/memory-model.rst b/Documentation/vm/memory-model.rst
index 2b898a27b346..769449734573 100644
--- a/Documentation/vm/memory-model.rst
+++ b/Documentation/vm/memory-model.rst
@@ -141,11 +141,8 @@ sections:
`mem_section` objects and the number of rows is calculated to fit
all the memory sections.
-The architecture setup code should call :c:func:`memory_present` for
-each active memory range or use :c:func:`memblocks_present` or
-:c:func:`sparse_memory_present_with_active_regions` wrappers to
-initialize the memory sections. Next, the actual memory maps should be
-set up using :c:func:`sparse_init`.
+The architecture setup code should call sparse_init() to
+initialize the memory sections and the memory maps.
With SPARSEMEM there are two possible ways to convert a PFN to the
corresponding `struct page` - a "classic sparse" and "sparse