x86/resctrl: Remove lockdep annotation that triggers false positive

Browse source

get_domain_from_cpu() walks a list of domains to find the one that
contains the specified CPU. This needs to be protected against races
with CPU hotplug when the list is modified. It has recently gained
a lockdep annotation to check this.

The lockdep annotation causes false positives when called via IPI as the
lock is held, but by another process. Remove it.

  [ bp: Refresh it ontop of x86/cache. ]

Fixes: fb700810d3 ("x86/resctrl: Separate arch and fs resctrl locks")
Reported-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/all/ZdUSwOM9UUNpw84Y@agluck-desk3

...

This commit is contained in:

James Morse 2024-02-21 12:23:06 +00:00 • committed by Borislav Petkov (AMD)

parent fb700810d3

commit c0d848fcb0

1 changed files with 0 additions and 9 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

9

arch/x86/kernel/cpu/resctrl/core.c

View file