powerpc: remove cpu_online_cores_map function

Browse source

This function builds the cores online map with on-stack cpumasks which
can cause high stack usage with large NR_CPUS.

It is not used in any performance sensitive paths, so instead just check
for first thread sibling.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211105035042.1398309-1-npiggin@gmail.com

...

This commit is contained in:

Nicholas Piggin 2021-11-05 13:50:41 +10:00 • committed by Michael Ellerman

parent af3fdce4ab

commit b350111bf7

3 changed files with 8 additions and 41 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

33

arch/powerpc/include/asm/cputhreads.h

View file

10

arch/powerpc/platforms/powernv/idle.c

View file

6

arch/powerpc/platforms/powernv/opal-imc.c

View file