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Christophe Leroy 902137ba8e powerpc/32: Add VDSO version of getcpu on non SMP 
Commit 18ad51dd342a ("powerpc: Add VDSO version of getcpu") added
getcpu() for PPC64 only, by making use of a user readable general
purpose SPR.

PPC32 doesn't have any such SPR.

For non SMP, just return CPU id 0 from the VDSO directly.
PPC32 doesn't support CONFIG_NUMA so NUMA node is always 0.

Before the patch, vdsotest reported:
getcpu: syscall: 1572 nsec/call
getcpu:    libc: 1787 nsec/call
getcpu:    vdso: not tested

Now, vdsotest reports:
getcpu: syscall: 1582 nsec/call
getcpu:    libc: 502 nsec/call
getcpu:    vdso: 187 nsec/call

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/eaac4b6494ecff1811220fccc895bf282aab884a.1575273217.git.christophe.leroy@c-s.fr
2020-01-23 21:31:14 +11:00
..
alpha
alpha: use pgtable-nopud instead of 4level-fixup
2019-12-04 19:44:14 -08:00
arc
treewide: Use sizeof_field() macro
2019-12-09 10:36:44 -08:00
arm
KVM/arm fixes for .5.5, take #1
2019-12-18 17:47:38 +01:00
arm64
mm/memory_hotplug: shrink zones when offlining memory
2020-01-04 13:55:08 -08:00
c6x
c6x: use pgtable-nopud instead of 4level-fixup
2019-12-04 19:44:15 -08:00
csky
dma-mapping updates for 5.5-rc1
2019-11-28 11:16:43 -08:00
h8300
h8300: Move EXCEPTION_TABLE to RO_DATA segment
2019-11-04 18:12:55 +01:00
hexagon
hexagon: define ioremap_uc
2020-01-04 13:55:09 -08:00
ia64
mm/memory_hotplug: shrink zones when offlining memory
2020-01-04 13:55:08 -08:00
m68k
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
2019-12-05 12:20:42 -08:00
microblaze
microblaze: use pgtable-nopmd instead of 4level-fixup
2019-12-04 19:44:15 -08:00
mips
A collection of MIPS fixes:
2020-01-04 14:16:57 -08:00
nds32
nds32: use pgtable-nopmd instead of 4level-fixup
2019-12-04 19:44:15 -08:00
nios2
nios2: Fix ioremap
2019-12-12 16:34:33 +08:00
openrisc
OpenRISC updates for 5.5
2019-12-02 17:18:43 -08:00
parisc
parisc: Fix compiler warnings in debug_core.c
2019-12-20 21:01:42 +01:00
powerpc
powerpc/32: Add VDSO version of getcpu on non SMP
2020-01-23 21:31:14 +11:00
riscv
riscv: prefix IRQ_ macro names with an RV_ namespace
2020-01-04 21:48:59 -08:00
s390
mm/memory_hotplug: shrink zones when offlining memory
2020-01-04 13:55:08 -08:00
sh
mm/memory_hotplug: shrink zones when offlining memory
2020-01-04 13:55:08 -08:00
sparc
treewide: Use sizeof_field() macro
2019-12-09 10:36:44 -08:00
um
um: add support for folded p4d page tables
2019-12-04 19:44:15 -08:00
unicore32
generic ioremap support
2019-11-28 10:57:12 -08:00
x86
mm/memory_hotplug: shrink zones when offlining memory
2020-01-04 13:55:08 -08:00
xtensa
arch: sembuf.h: make uapi asm/sembuf.h self-contained
2019-12-04 19:44:14 -08:00
.gitignore
…
Kconfig
arch/Kconfig: fix indentation
2019-12-04 19:44:12 -08:00