Re: [PATCH] mm/show_mem: fix format string inconsistencies and type mismatches

[Johannes Weiner]

On Wed, Aug 05, 2026 at 10:15:55AM +0800, Ye Liu wrote:
> From: Ye Liu <liuye@xxxxxxxxxx>
> 
> Fix five format string issues in show_free_areas() and __show_mem():
> 
> 1-2. reserved_highatomic and free_highatomic: %luKB -> %lukB
>    The uppercase "KB" is inconsistent with all other fields in the
>    same output block and with /proc/meminfo convention.
> 
> 3. local_pcp: %ukB -> %lukB with explicit (unsigned long) cast
>    per_cpu_pages.count is int, so K(count) yields int. Using %u
>    was a signed/unsigned mismatch. Cast to unsigned long and use
>    %lu for consistency with all other K() usages in the file.
> 
> 4. total pagecache pages: %ld -> %lu
>    global_node_page_state() returns unsigned long. Using %ld is a
>    signedness mismatch caught by gcc -Wformat-signedness.
> 
> 5. hwpoisoned pages: %lu -> %ld
>    atomic_long_read() returns long (signed). Using %lu is a
>    signedness mismatch caught by gcc -Wformat-signedness.
> 
> Verified with: make KCFLAGS="-Wformat -Wformat-signedness" mm/show_mem.o
> 
> Signed-off-by: Ye Liu <liuye@xxxxxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>