Re: [patch-2.3.41-pre4] small optimization of access(2)

From: Horst von Brand (vonbrand@sleipnir.valparaiso.cl)
Date: Fri Jan 28 2000 - 21:48:51 EST

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Tigran Aivazian <tigran@sco.COM> said:
> This patch reduces the length of holding kernel lock and removes one extra
> initialization and a goto label from sys_access() and uses if(mode &
> ~mask) instead of if(mode != (mode&mask)).

Careful!

mode = 0xFF0F
mask = 0xF000

mode & ~mask == 0x0F00, i.e., true
mode & mask == 0xFF00 != mode

-- Horst von Brand vonbrand@sleipnir.valparaiso.cl Casilla 9G, Viña del Mar, Chile +56 32 672616

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