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author | Al Viro <viro@zeniv.linux.org.uk> | 2009-11-30 08:38:43 -0500 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-12-11 06:34:09 -0500 |
commit | c4caa778157dbbf04116f0ac2111e389b5cd7a29 (patch) | |
tree | d8e26c07bacaaa6b1e6b1e57816fd42da94e15f4 /ipc | |
parent | 0ec62d290912bb4b989be7563851bc364ec73b56 (diff) | |
download | kernel_goldelico_gta04-c4caa778157dbbf04116f0ac2111e389b5cd7a29.zip kernel_goldelico_gta04-c4caa778157dbbf04116f0ac2111e389b5cd7a29.tar.gz kernel_goldelico_gta04-c4caa778157dbbf04116f0ac2111e389b5cd7a29.tar.bz2 |
file ->get_unmapped_area() shouldn't duplicate work of get_unmapped_area()
... we should call mm ->get_unmapped_area() instead and let our caller
do the final checks.
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc')
-rw-r--r-- | ipc/shm.c | 31 |
1 files changed, 17 insertions, 14 deletions
@@ -290,28 +290,28 @@ static unsigned long shm_get_unmapped_area(struct file *file, unsigned long flags) { struct shm_file_data *sfd = shm_file_data(file); - return get_unmapped_area(sfd->file, addr, len, pgoff, flags); -} - -int is_file_shm_hugepages(struct file *file) -{ - int ret = 0; - - if (file->f_op == &shm_file_operations) { - struct shm_file_data *sfd; - sfd = shm_file_data(file); - ret = is_file_hugepages(sfd->file); - } - return ret; + return sfd->file->f_op->get_unmapped_area(sfd->file, addr, len, + pgoff, flags); } static const struct file_operations shm_file_operations = { .mmap = shm_mmap, .fsync = shm_fsync, .release = shm_release, +}; + +static const struct file_operations shm_file_operations_huge = { + .mmap = shm_mmap, + .fsync = shm_fsync, + .release = shm_release, .get_unmapped_area = shm_get_unmapped_area, }; +int is_file_shm_hugepages(struct file *file) +{ + return file->f_op == &shm_file_operations_huge; +} + static const struct vm_operations_struct shm_vm_ops = { .open = shm_open, /* callback for a new vm-area open */ .close = shm_close, /* callback for when the vm-area is released */ @@ -889,7 +889,10 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr) if (!sfd) goto out_put_dentry; - file = alloc_file(path.mnt, path.dentry, f_mode, &shm_file_operations); + file = alloc_file(path.mnt, path.dentry, f_mode, + is_file_hugepages(shp->shm_file) ? + &shm_file_operations_huge : + &shm_file_operations); if (!file) goto out_free; ima_counts_get(file); |