| From 70b66cbfd3316b792a855cb9a2574e85f1a63d0f Mon Sep 17 00:00:00 2001 |
| From: Ivan Kokshaysky <ink@jurassic.park.msu.ru> |
| Date: Thu, 15 Jan 2009 13:51:17 -0800 |
| Subject: alpha: nautilus - fix compile failure with gcc-4.3 |
| |
| From: Ivan Kokshaysky <ink@jurassic.park.msu.ru> |
| |
| commit 70b66cbfd3316b792a855cb9a2574e85f1a63d0f upstream. |
| |
| init_srm_irq() deals with irq's #16 and above, but size of irq_desc |
| array on nautilus and some other system types is 16. So gcc-4.3 |
| complains that "array subscript is above array bounds", even though |
| this function is never called on those systems. |
| |
| This adds a check for NR_IRQS <= 16, which effectively optimizes |
| init_srm_irq() code away on problematic platforms. |
| |
| Thanks to Daniel Drake <dsd@gentoo.org> for detailed analysis |
| of the problem. |
| |
| Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> |
| Cc: Richard Henderson <rth@twiddle.net> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Cc: Tobias Klausmann <klausman@schwarzvogel.de> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| arch/alpha/kernel/irq_srm.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/arch/alpha/kernel/irq_srm.c |
| +++ b/arch/alpha/kernel/irq_srm.c |
| @@ -63,6 +63,8 @@ init_srm_irqs(long max, unsigned long ig |
| { |
| long i; |
| |
| + if (NR_IRQS <= 16) |
| + return; |
| for (i = 16; i < max; ++i) { |
| if (i < 64 && ((ignore_mask >> i) & 1)) |
| continue; |