diff options
| author | Jeremy Kerr <jk@ozlabs.org> | 2007-07-20 21:39:31 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@klappe.arndb.de> | 2007-07-20 21:41:48 +0200 |
| commit | d054b36ffd302ec65aabec16a0c60ddd9e6b5a62 (patch) | |
| tree | 8e19f833d7751f74a08cb8dd888c8f4a6e70f830 /arch/powerpc | |
| parent | 49776d30aea903fb2f9966c8e9b6f23ae5f7c937 (diff) | |
[CELL] spufs: Make signal-notification files readonly for NOSCHED contexts
Reading from the signal{1,2} files requires a spu_acquire_saved, so
make these files write-only for contexts created with
SPU_CREATE_NOSCHED.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/file.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c index c2814ea96af..fe164112b3d 100644 --- a/arch/powerpc/platforms/cell/spufs/file.c +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -934,6 +934,13 @@ static const struct file_operations spufs_signal1_fops = { .mmap = spufs_signal1_mmap, }; +static const struct file_operations spufs_signal1_nosched_fops = { + .open = spufs_signal1_open, + .release = spufs_signal1_release, + .write = spufs_signal1_write, + .mmap = spufs_signal1_mmap, +}; + static int spufs_signal2_open(struct inode *inode, struct file *file) { struct spufs_inode_info *i = SPUFS_I(inode); @@ -1062,6 +1069,13 @@ static const struct file_operations spufs_signal2_fops = { .mmap = spufs_signal2_mmap, }; +static const struct file_operations spufs_signal2_nosched_fops = { + .open = spufs_signal2_open, + .release = spufs_signal2_release, + .write = spufs_signal2_write, + .mmap = spufs_signal2_mmap, +}; + static void spufs_signal1_type_set(void *data, u64 val) { struct spu_context *ctx = data; @@ -2184,8 +2198,8 @@ struct tree_descr spufs_dir_nosched_contents[] = { { "mbox_stat", &spufs_mbox_stat_fops, 0444, }, { "ibox_stat", &spufs_ibox_stat_fops, 0444, }, { "wbox_stat", &spufs_wbox_stat_fops, 0444, }, - { "signal1", &spufs_signal1_fops, 0666, }, - { "signal2", &spufs_signal2_fops, 0666, }, + { "signal1", &spufs_signal1_nosched_fops, 0222, }, + { "signal2", &spufs_signal2_nosched_fops, 0222, }, { "signal1_type", &spufs_signal1_type, 0666, }, { "signal2_type", &spufs_signal2_type, 0666, }, { "mss", &spufs_mss_fops, 0666, }, |