Re: [PATCH 86/87] fs: switch timespec64 fields in inode to discrete integers
Jeff Layton <[email protected]>
| Newsgroups | gmane.comp.file-systems.btrfs,gmane.linux.file-systems,gmane.linux.kernel,gmane.linux.kernel.mm,gmane.linux.ports.ppc64.devel,gmane.linux.drivers.platform.x86.devel,gmane.linux.drivers.rdma,gmane.linux.serial,gmane.linux.usb.general,gmane.linux.kernel.autofs,gmane.comp.file-systems.ceph.devel,gmane.comp.file-systems.coda.general,gmane.linux.kernel.efi,gmane.comp.file-systems.ext4,gmane.linux.file-systems.f2fs,gmane.linux.uml.devel,gmane.linux.drivers.mtd,gmane.linux.nfs,gmane.comp.file-systems.nilfs.user,gmane.linux.file-systems.ntfs.devel,gmane.linux.hardware.karma.devel,gmane.linux.file-systems.union,gmane.comp.file-systems.reiserfs.general,gmane.linux.kernel.cifs,gmane.network.samba.internals,gmane.linux.kernel.bpf,gmane.linux.network,gmane.comp.security.apparmor,gmane.linux.kernel.lsm |
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| Message-ID | <[email protected]> |
On Thu, 2023-09-28 at 07:05 -0400, Jeff Layton wrote: > This shaves 8 bytes off struct inode, according to pahole. > > Signed-off-by: Jeff Layton <[email protected]> > --- > include/linux/fs.h | 32 +++++++++++++++++++++++--------- > 1 file changed, 23 insertions(+), 9 deletions(-) > > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 831657011036..de902ff2938b 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -671,9 +671,12 @@ struct inode { > }; > dev_t i_rdev; > loff_t i_size; > - struct timespec64 __i_atime; /* use inode_*_atime accessors */ > - struct timespec64 __i_mtime; /* use inode_*_mtime accessors */ > - struct timespec64 __i_ctime; /* use inode_*_ctime accessors */ > + time64_t i_atime_sec; > + time64_t i_mtime_sec; > + time64_t i_ctime_sec; > + u32 i_atime_nsec; > + u32 i_mtime_nsec; > + u32 i_ctime_nsec; > spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */ > unsigned short i_bytes; > u8 i_blkbits; > @@ -1519,7 +1522,9 @@ struct timespec64 inode_set_ctime_current(struct inode *inode); > */ > static inline struct timespec64 inode_get_ctime(const struct inode *inode) > { > - return inode->__i_ctime; > + struct timespec64 ts = { .tv_sec = inode->i_ctime_sec, > + .tv_nsec = inode->i_ctime_nsec }; > + return ts; > } > > > > /** > @@ -1532,7 +1537,8 @@ static inline struct timespec64 inode_get_ctime(const struct inode *inode) > static inline struct timespec64 inode_set_ctime_to_ts(struct inode *inode, > struct timespec64 ts) > { > - inode->__i_ctime = ts; > + inode->i_ctime_sec = ts.tv_sec; > + inode->i_ctime_nsec = ts.tv_sec; Bug above and in the other inode_set_?time_to_ts() functions. This isn't setting the nsec field correctly. > return ts; > } > > > > @@ -1555,13 +1561,17 @@ static inline struct timespec64 inode_set_ctime(struct inode *inode, > > static inline struct timespec64 inode_get_atime(const struct inode *inode) > { > - return inode->__i_atime; > + struct timespec64 ts = { .tv_sec = inode->i_atime_sec, > + .tv_nsec = inode->i_atime_nsec }; > + > + return ts; > } > > static inline struct timespec64 inode_set_atime_to_ts(struct inode *inode, > struct timespec64 ts) > { > - inode->__i_atime = ts; > + inode->i_atime_sec = ts.tv_sec; > + inode->i_atime_nsec = ts.tv_sec; > return ts; > } > > @@ -1575,13 +1585,17 @@ static inline struct timespec64 inode_set_atime(struct inode *inode, > > static inline struct timespec64 inode_get_mtime(const struct inode *inode) > { > - return inode->__i_mtime; > + struct timespec64 ts = { .tv_sec = inode->i_mtime_sec, > + .tv_nsec = inode->i_mtime_nsec }; > + > + return ts; > } > > static inline struct timespec64 inode_set_mtime_to_ts(struct inode *inode, > struct timespec64 ts) > { > - inode->__i_mtime = ts; > + inode->i_atime_sec = ts.tv_sec; > + inode->i_atime_nsec = ts.tv_sec; Doh! s/atime/mtime/ in the above lines. > return ts; > } > Both bugs are fixed in my tree. -- Jeff Layton <[email protected]>