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authorKefeng Wang <wangkefeng.wang@huawei.com>2022-01-19 18:07:41 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-20 08:52:52 +0200
commit7ecd19cfdfcbb625cc059dfa5b267d2436732c1c (patch)
treee024e96ae71d87b2a4be0cc997689808a6f9209d /arch/ia64
parentdf0cc57e057f18e44dac8e6c18aba47ab53202f9 (diff)
mm: percpu: generalize percpu related config
Patch series "mm: percpu: Cleanup percpu first chunk function". When supporting page mapping percpu first chunk allocator on arm64, we found there are lots of duplicated codes in percpu embed/page first chunk allocator. This patchset is aimed to cleanup them and should no function change. The currently supported status about 'embed' and 'page' in Archs shows below, embed: NEED_PER_CPU_PAGE_FIRST_CHUNK page: NEED_PER_CPU_EMBED_FIRST_CHUNK embed page ------------------------ arm64 Y Y mips Y N powerpc Y Y riscv Y N sparc Y Y x86 Y Y ------------------------ There are two interfaces about percpu first chunk allocator, extern int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size, size_t atom_size, pcpu_fc_cpu_distance_fn_t cpu_distance_fn, - pcpu_fc_alloc_fn_t alloc_fn, - pcpu_fc_free_fn_t free_fn); + pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn); extern int __init pcpu_page_first_chunk(size_t reserved_size, - pcpu_fc_alloc_fn_t alloc_fn, - pcpu_fc_free_fn_t free_fn, - pcpu_fc_populate_pte_fn_t populate_pte_fn); + pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn); The pcpu_fc_alloc_fn_t/pcpu_fc_free_fn_t is killed, we provide generic pcpu_fc_alloc() and pcpu_fc_free() function, which are called in the pcpu_embed/page_first_chunk(). 1) For pcpu_embed_first_chunk(), pcpu_fc_cpu_to_node_fn_t is needed to be provided when archs supported NUMA. 2) For pcpu_page_first_chunk(), the pcpu_fc_populate_pte_fn_t is killed too, a generic pcpu_populate_pte() which marked '__weak' is provided, if you need a different function to populate pte on the arch(like x86), please provide its own implementation. [1] https://github.com/kevin78/linux.git percpu-cleanup This patch (of 4): The HAVE_SETUP_PER_CPU_AREA/NEED_PER_CPU_EMBED_FIRST_CHUNK/ NEED_PER_CPU_PAGE_FIRST_CHUNK/USE_PERCPU_NUMA_NODE_ID configs, which have duplicate definitions on platforms that subscribe it. Move them into mm, drop these redundant definitions and instead just select it on applicable platforms. Link: https://lkml.kernel.org/r/20211216112359.103822-1-wangkefeng.wang@huawei.com Link: https://lkml.kernel.org/r/20211216112359.103822-2-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Will Deacon <will@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/Kconfig9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 1e33666fa679..703952819e10 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -32,6 +32,7 @@ config IA64
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_DYNAMIC_FTRACE if (!ITANIUM)
select HAVE_FUNCTION_TRACER
+ select HAVE_SETUP_PER_CPU_AREA
select TTY
select HAVE_ARCH_TRACEHOOK
select HAVE_VIRT_CPU_ACCOUNTING
@@ -88,9 +89,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config HAVE_SETUP_PER_CPU_AREA
- def_bool y
-
config DMI
bool
default y
@@ -292,6 +290,7 @@ config NUMA
bool "NUMA support"
depends on !FLATMEM
select SMP
+ select USE_PERCPU_NUMA_NODE_ID
help
Say Y to compile the kernel to support NUMA (Non-Uniform Memory
Access). This option is for configuring high-end multiprocessor
@@ -311,10 +310,6 @@ config HAVE_ARCH_NODEDATA_EXTENSION
def_bool y
depends on NUMA
-config USE_PERCPU_NUMA_NODE_ID
- def_bool y
- depends on NUMA
-
config HAVE_MEMORYLESS_NODES
def_bool NUMA