irqreturn_t unsignedness

Linus, please do a

bk pull bk://kernel.bkbits.net/jgarzik/irq-return-2.5

This will update the following files:

 include/linux/interrupt.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

through these ChangeSets:

<[email protected]> (03/04/25 1.1252)
s/int/unsigned int/ for irqreturn_t definition.

Pragmatic change. Would prefer to make it now rather than later. Though sign-extension problems are unlikely, I prefer 'unsigned int' because it occasionally generates better code, and 'int' occasionally generates sub-optimal code (because the compiler cannot rule out negative values during optimization).

Better still would be to indicate the variable's true range via _Bool: zero, and non-zero, but I did not make that change here.