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| author | Jack Steiner | 2009-12-16 01:48:02 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2009-12-16 16:20:14 +0100 |
| commit | 091f1a10614db89a108cda980425799730d73d8a (patch) | |
| tree | 1564f5eec330225cc652c9c89209d84898a7c653 /drivers/misc/sgi-gru/grufault.c | |
| parent | gru: initial GRU based on blade topology (diff) | |
| download | kernel-qcow2-linux-091f1a10614db89a108cda980425799730d73d8a.tar.gz kernel-qcow2-linux-091f1a10614db89a108cda980425799730d73d8a.tar.xz kernel-qcow2-linux-091f1a10614db89a108cda980425799730d73d8a.zip | |
gru: add comments raised in previous code reviews
Add comments from previous code reviews. The comments help explain some
of the more esoteric aspects of the driver.
Move a free() to the other side of an unlock.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grufault.c')
| -rw-r--r-- | drivers/misc/sgi-gru/grufault.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c index 679e01778286..2605edfbaebe 100644 --- a/drivers/misc/sgi-gru/grufault.c +++ b/drivers/misc/sgi-gru/grufault.c @@ -733,6 +733,11 @@ long gru_get_gseg_statistics(unsigned long arg) if (copy_from_user(&req, (void __user *)arg, sizeof(req))) return -EFAULT; + /* + * The library creates arrays of contexts for threaded programs. + * If no gts exists in the array, the context has never been used & all + * statistics are implicitly 0. + */ gts = gru_find_lock_gts(req.gseg); if (gts) { memcpy(&req.stats, >s->ustats, sizeof(gts->ustats)); |