Messages in this thread Patch in this message | | | From | "Heusden, Folkert van" <> | Subject | [PATCH] kernel/exit.c - 2.4.2 - small optimalisation (very small) to do_exit() | Date | Mon, 26 Mar 2001 11:45:14 +0200 |
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Hi,
This very small patches re-orders 2 if-statements so that in the most common case 1 less if-statement is executed, in the worst case the same number of if-statements is executed (doesn't matter though: it's would be the fault-situation anyway).
diff -ur --minimal linux-vanilla/kernel/exit.c linux-2.4.2/kernel/exit.c --- linux-vanilla/kernel/exit.c Mon Mar 26 09:28:13 2001 +++ linux-2.4.2/kernel/exit.c Mon Mar 26 10:50:30 2001 @@ -425,10 +425,12 @@ if (in_interrupt()) panic("Aiee, killing interrupt handler!"); - if (!tsk->pid) - panic("Attempted to kill the idle task!"); - if (tsk->pid == 1) - panic("Attempted to kill init!"); + if (tsk->pid <= 1) { + if (tsk->pid) + panic("Attempted to kill init!"); + else + panic("Attempted to kill the idle task!"); + } tsk->flags |= PF_EXITING; del_timer_sync(&tsk->real_timer);
Greetings,
Folkert van Heusden (folkert@vanheusden.com) [ www.vanheusden.com ]
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