powerpc/64s: Clarify copy_and_flush() cache sync loop comment

The value loaded into r0 in copy_and_flush() represents the number of
8-byte words processed between cache synchronization operations.

The existing comment refers to cache line size, which can make it appear
that the value is a cache line size in bytes rather than a loop count.
Clarify the comment to explain that the loop processes 8 words (64 bytes)
per cache synchronization iteration, and that increasing the value would
skip cache maintenance for intermediate cache lines.

This is a comment-only change with no functional impact.

Signed-off-by: Nikhil Kumar Singh <nikhilks@linux.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Reviewed-by: Aditya Gupta <adityag@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260706082708.43918-1-nikhilks@linux.ibm.com

0 files changed, 0 insertions, 0 deletions