On 7/13/12 8:19 AM, Lukas Czerner wrote:
> Currently we're passing -1 to shmem_truncate_range which can then call
> truncate_inode_pages_range() which is actually really confusing since the
> argument is signed so we do not get "huge" number as one would expect,
> but rather just -1. To make things clearer and easier for
> truncate_inode_pages_range() just pass LLONG_MAX since it is actually what
> was intended anyway.
>
> It also makes thing easier for allowing truncate_inode_pages_range() to
> handle non page aligned regions. Moreover letting the lend argument to
> be negative might actually hide some bugs.
>
> Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx>
> Cc: Hugh Dickins <hughd@xxxxxxxxxx>
> ---
> mm/shmem.c | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/mm/shmem.c b/mm/shmem.c
> index 4ce02e0..3199733 100644
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -2961,7 +2961,8 @@ void shmem_unlock_mapping(struct address_space *mapping)
>
> void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
> {
> - truncate_inode_pages_range(inode->i_mapping, lstart, lend);
> + truncate_inode_pages_range(inode->i_mapping, lstart,
> + lend == -1 ? LLONG_MAX : last);
Where'd "last" come from? That won't build; should be "lend" right?
(code only goes this way if !CONFIG_SHMEM so you might have missed it)
-Eric
> }
> EXPORT_SYMBOL_GPL(shmem_truncate_range);
>
>
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