* Re: [PATCH] bitops: simplify generic bit finding functions [not found] ` <1209328161.14173.77.camel@brick> @ 2008-04-27 20:36 ` Al Viro 2008-04-27 20:38 ` Harvey Harrison 0 siblings, 1 reply; 2+ messages in thread From: Al Viro @ 2008-04-27 20:36 UTC (permalink / raw) To: Harvey Harrison Cc: Linus Torvalds, Ingo Molnar, Andrew Morton, LKML, linux-sparse On Sun, Apr 27, 2008 at 01:29:21PM -0700, Harvey Harrison wrote: > Oh, I didn't realize, I only did this because sparse started spewing out > lots of: > include/linux/bitops.h:166:32: warning: shift too big (65536) for type unsigned long > > due to shift by size there, and again on line 202...I just wanted something > that sparse wouldn't warn about and was a little easier to understand to boot. That's a sparse problem, really. I wonder if we simply should introduce a new node type: EXPR_WARN. So that expand would generate those from things like division by zero/overflow/bad shift *and* emitting an insn for those would generate a stored warning. Objections? ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] bitops: simplify generic bit finding functions 2008-04-27 20:36 ` [PATCH] bitops: simplify generic bit finding functions Al Viro @ 2008-04-27 20:38 ` Harvey Harrison 0 siblings, 0 replies; 2+ messages in thread From: Harvey Harrison @ 2008-04-27 20:38 UTC (permalink / raw) To: Al Viro; +Cc: Linus Torvalds, Ingo Molnar, Andrew Morton, LKML, linux-sparse On Sun, 2008-04-27 at 21:36 +0100, Al Viro wrote: > On Sun, Apr 27, 2008 at 01:29:21PM -0700, Harvey Harrison wrote: > > > Oh, I didn't realize, I only did this because sparse started spewing out > > lots of: > > include/linux/bitops.h:166:32: warning: shift too big (65536) for type unsigned long > > > > due to shift by size there, and again on line 202...I just wanted something > > that sparse wouldn't warn about and was a little easier to understand to boot. > > That's a sparse problem, really. I wonder if we simply should introduce a > new node type: EXPR_WARN. So that expand would generate those from things > like division by zero/overflow/bad shift *and* emitting an insn for those > would generate a stored warning. Well, even though it is a sparse problem, I think my revised version was cleaner code anyway. > > Objections? None here Harvey ^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-04-27 20:36 ` [PATCH] bitops: simplify generic bit finding functions Al Viro
2008-04-27 20:38 ` Harvey Harrison
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