[PATCH v3 12/12] treewide: change inode->i_ino from unsigned long to u64

Damien Le Moal dlemoal at kernel.org
Wed Mar 4 13:41:21 PST 2026


On 3/5/26 00:32, Jeff Layton wrote:
> On 32-bit architectures, unsigned long is only 32 bits wide, which
> causes 64-bit inode numbers to be silently truncated. Several
> filesystems (NFS, XFS, BTRFS, etc.) can generate inode numbers that
> exceed 32 bits, and this truncation can lead to inode number collisions
> and other subtle bugs on 32-bit systems.
> 
> Change the type of inode->i_ino from unsigned long to u64 to ensure that
> inode numbers are always represented as 64-bit values regardless of
> architecture. Update all format specifiers treewide from %lu/%lx to
> %llu/%llx to match the new type, along with corresponding local variable
> types.
> 
> This is the bulk treewide conversion. Earlier patches in this series
> handled trace events separately to allow trace field reordering for
> better struct packing on 32-bit.
> 
> Signed-off-by: Jeff Layton <jlayton at kernel.org>

For the zonefs bits:

Acked-by: Damien Le Moal <dlemoal at kernel.org>

-- 
Damien Le Moal
Western Digital Research



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