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| author | Jeremy Kerr <jk@ozlabs.org> | 2007-07-21 04:37:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-21 17:49:16 -0700 |
| commit | 8b6f50ef1d5cc86b278eb42bc91630fad455fb10 (patch) | |
| tree | 363762c8b3775ffd48cb469e09161cb6743fbe67 | |
| parent | cfd13af6270c25e8089e9c5b59ffb55d39ae74a0 (diff) | |
| download | linux-8b6f50ef1d5cc86b278eb42bc91630fad455fb10.tar.gz linux-8b6f50ef1d5cc86b278eb42bc91630fad455fb10.tar.bz2 linux-8b6f50ef1d5cc86b278eb42bc91630fad455fb10.zip | |
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>
Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -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 7de4e919687b..c2aaec5289dc 100644 --- a/arch/powerpc/platforms/cell/spufs/file.c +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -941,6 +941,13 @@ static const struct file_operations spufs_signal1_nosched_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); @@ -1076,6 +1083,13 @@ static const struct file_operations spufs_signal2_nosched_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; @@ -2177,8 +2191,8 @@ struct tree_descr spufs_dir_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, }, { "cntl", &spufs_cntl_fops, 0666, }, |