Searched hist:"895 adbec" (Results 1 – 3 of 3) sorted by relevance
/openbmc/linux/fs/kernfs/ |
H A D | kernfs-internal.h | 895adbec Fri Jul 16 04:28:18 CDT 2021 Ian Kent <raven@themaw.net> kernfs: add a revision to identify directory node changes
Add a revision counter to kernfs directory nodes so it can be used to detect if a directory node has changed during negative dentry revalidation.
There's an assumption that sizeof(unsigned long) <= sizeof(pointer) on all architectures and as far as I know that assumption holds.
So adding a revision counter to the struct kernfs_elem_dir variant of the kernfs_node type union won't increase the size of the kernfs_node struct. This is because struct kernfs_elem_dir is at least sizeof(pointer) smaller than the largest union variant. It's tempting to make the revision counter a u64 but that would increase the size of kernfs_node on archs where sizeof(pointer) is smaller than the revision counter.
Reviewed-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Ian Kent <raven@themaw.net> Link: https://lore.kernel.org/r/162642769895.63632.8356662784964509867.stgit@web.messagingengine.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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H A D | dir.c | 895adbec Fri Jul 16 04:28:18 CDT 2021 Ian Kent <raven@themaw.net> kernfs: add a revision to identify directory node changes
Add a revision counter to kernfs directory nodes so it can be used to detect if a directory node has changed during negative dentry revalidation.
There's an assumption that sizeof(unsigned long) <= sizeof(pointer) on all architectures and as far as I know that assumption holds.
So adding a revision counter to the struct kernfs_elem_dir variant of the kernfs_node type union won't increase the size of the kernfs_node struct. This is because struct kernfs_elem_dir is at least sizeof(pointer) smaller than the largest union variant. It's tempting to make the revision counter a u64 but that would increase the size of kernfs_node on archs where sizeof(pointer) is smaller than the revision counter.
Reviewed-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Ian Kent <raven@themaw.net> Link: https://lore.kernel.org/r/162642769895.63632.8356662784964509867.stgit@web.messagingengine.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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/openbmc/linux/include/linux/ |
H A D | kernfs.h | 895adbec Fri Jul 16 04:28:18 CDT 2021 Ian Kent <raven@themaw.net> kernfs: add a revision to identify directory node changes
Add a revision counter to kernfs directory nodes so it can be used to detect if a directory node has changed during negative dentry revalidation.
There's an assumption that sizeof(unsigned long) <= sizeof(pointer) on all architectures and as far as I know that assumption holds.
So adding a revision counter to the struct kernfs_elem_dir variant of the kernfs_node type union won't increase the size of the kernfs_node struct. This is because struct kernfs_elem_dir is at least sizeof(pointer) smaller than the largest union variant. It's tempting to make the revision counter a u64 but that would increase the size of kernfs_node on archs where sizeof(pointer) is smaller than the revision counter.
Reviewed-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Ian Kent <raven@themaw.net> Link: https://lore.kernel.org/r/162642769895.63632.8356662784964509867.stgit@web.messagingengine.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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