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[ Upstream commit5ed4b6b37c] objpool uses struct objpool_head to store metadata information, and its cpu_slots member points to an array of pointers that store the addresses of the percpu ring arrays. However, the memory size allocated during the initialization of cpu_slots is nr_cpu_ids * sizeof(struct objpool_slot). On a 64-bit machine, the size of struct objpool_slot is 16 bytes, which is twice the size of the actual pointer required, and the extra memory is never be used, resulting in a waste of memory. Therefore, the memory size required for cpu_slots needs to be corrected. Link: https://lkml.kernel.org/r/20260202132846.68257-1-zhouwenhao7600@gmail.com Fixes:b4edb8d2d4("lib: objpool added: ring-array based lockless MPMC") Signed-off-by: zhouwenhao <zhouwenhao7600@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org> Cc: Matt Wu <wuqiang.matt@bytedance.com> Cc: wuqiang.matt <wuqiang.matt@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>