Messages in this thread | | | Date | Thu, 6 Dec 2007 10:50:06 -0800 | From | Greg KH <> | Subject | Re: 2.6.24-rc4-mm1 kobject changes broken with hvcs driver on powerpc |
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On Thu, Dec 06, 2007 at 11:49:59PM +0530, Balbir Singh wrote: > Kamalesh Babulal wrote: > > Hi Andrew, > > > > The 2.6.24-rc4-mm1 kernel build fails with build failure, > > > > CC drivers/char/hvcs.o > > drivers/char/hvcs.c: In function ‘hvcs_open’: > > drivers/char/hvcs.c:1180: error: wrong type argument to unary exclamation mark > > make[2]: *** [drivers/char/hvcs.o] Error 1 > > make[1]: *** [drivers/char] Error 2 > > make: *** [drivers] Error 2 > > > > The kref_get begin void return type, check for the kobject return type > > as in the previous kobject_get() > > > > if (!kref_get(&hvcsd->kref)) { > > spin_unlock_irqrestore(&hvcsd->lock, flags); > > printk(KERN_ERR "HVCS: Kobject of open" > > " hvcs doesn't exist.\n"); > > return -EFAULT; /* Is this the right return value? */ > > } > > > > I have tested for the build failure only. > > > > Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> > > -- > > --- linux-2.6.24-rc4/drivers/char/hvcs.c 2007-12-05 12:17:37.000000000 +0530 > > +++ linux-2.6.24-rc4/drivers/char/~hvcs.c 2007-12-05 19:17:12.000000000 +0530 > > @@ -1177,12 +1177,8 @@ fast_open: > > hvcsd = tty->driver_data; > > > > spin_lock_irqsave(&hvcsd->lock, flags); > > - if (!kref_get(&hvcsd->kref)) { > > - spin_unlock_irqrestore(&hvcsd->lock, flags); > > - printk(KERN_ERR "HVCS: Kobject of open" > > - " hvcs doesn't exist.\n"); > > - return -EFAULT; /* Is this the right return value? */ > > - } > > + kref_get(&hvcsd->kref); > > + spin_unlock_irqrestore(&hvcsd->lock, flags); > > > > Why release the spinlock here? It's done after the count is incremented. > This patch does not seem correct.
Doh, you are correct, I'll make sure that I fix this up before applying it.
thanks,
greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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