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474aeffd88
numa_nodemask_from_meminfo() generates a nodemask of nodes which have
memory according to a meminfo descriptor.
The two callsites of that function both set bits in copies of the
numa_nodes_parsed nodemask. In both cases, the information in supplied
numa_meminfo is a subset of numa_nodes_parsed. So setting those bits
again is not really necessary.
Here are the three call paths which show that the supplied numa_meminfo
argument describes memory regions in nodes which are already in
numa_nodes_parsed:
x86_numa_init()
numa_init()
Case 1:
acpi_numa_init()
acpi_parse_memory_affinity()
numa_add_memblk()
node_set(numa_nodes_parsed)
acpi_parse_slit()
acpi_numa_slit_init()
numa_set_distance()
numa_alloc_distance()
numa_nodemask_from_meminfo()
Case 2:
amd_numa_init()
numa_add_memblk()
node_set(numa_nodes_parsed)
Case 3
dummy_numa_init()
node_set(numa_nodes_parsed)
numa_add_memblk()
numa_register_memblks()
numa_nodemask_from_meminfo()
Thus, in all three cases, the respective bit in numa_nodes_parsed is
set, which means it is not necessary to set it again in a copy of
numa_nodes_parsed.
So remove that function.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20170314030801.13656-2-richard.weiyang@gmail.com
[ Heavily massage commit message. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.