ARM: l2c: print a warning with L2C-310 caches if the cache size is modified

As we have now removed all instances of the L2C-310 having its cache
size "modified" via platform/SoC code, discourage new cases showing
up by printing a warning.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index ae6e71b3295c..415efc3bee0d 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -765,6 +765,8 @@ static void __init __l2c_init(const struct l2c_init_data *data,
         /* Determine the number of ways */
         switch (cache_id & L2X0_CACHE_ID_PART_MASK) {
         case L2X0_CACHE_ID_PART_L310:
+                if ((aux_val | ~aux_mask) & (L2C_AUX_CTRL_WAY_SIZE_MASK | L310_AUX_CTRL_ASSOCIATIVITY_16))
+                        pr_warn("L2C: DT/platform tries to modify or specify cache size\n");
                 if (aux & (1 << 16))
                         ways = 16;
                 else