ARM: 9522/1: cacheinfo: guard the CLIDR read in populate_cache_leaves()

ARM1176 and ARM11 MPCore can be reported as ARMv7 by
cpu_architecture() even though they lack CLIDR. populate_cache_leaves()
therefore needs the CTR-format check used by detect_cache_level().

DT-based early allocation bypasses init_cache_level(), so its check
no longer protects populate_cache_leaves(). A combined ARMv6/ARMv7
SMP kernel can reach this path on BCM2835, whose DT describes its
caches.

Share the CLIDR capability check between detection and population.
Return -ENOENT from population when CLIDR is unavailable, preserving
the existing absence of cacheinfo and avoiding a new topology warning.

Assisted-by: LLM

Cc: stable@vger.kernel.org
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20260912195552.76673-4-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

0 files changed, 0 insertions, 0 deletions