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Use __insn_barrier() to prevent the compiler reordering splx/splraise 

relative to the code they're supposed to protect.
This commit is contained in:
scw 2004-01-12 10:25:06 +00:00
parent a77e611113
commit dcb1b313f5
2 changed files with 14 additions and 2 deletions
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8
sys/arch/arm/xscale/i80321_intr.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: i80321_intr.h,v 1.4 2003/09/21 19:32:39 matt Exp $ */
/* $NetBSD: i80321_intr.h,v 1.5 2004/01/12 10:25:06 scw Exp $ */
/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
@ -72,6 +72,9 @@ i80321_splx(int new)
extern void i80321_do_pending(void);
int oldirqstate, hwpend;
/* Don't let the compiler re-order this code with preceding code */
__insn_barrier();
current_spl_level = new;
hwpend = (i80321_ipending & ICU_INT_HWMASK) & ~new;
@ -96,6 +99,9 @@ i80321_splraise(int ipl)
old = current_spl_level;
current_spl_level |= i80321_imask[ipl];
/* Don't let the compiler re-order this code with subsequent code */
__insn_barrier();
return (old);
}

8
sys/arch/arm/xscale/ixp425_intr.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: ixp425_intr.h,v 1.2 2003/09/21 19:32:40 matt Exp $ */
/* $NetBSD: ixp425_intr.h,v 1.3 2004/01/12 10:25:06 scw Exp $ */
/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
@ -72,6 +72,9 @@ ixp425_splx(int new)
extern void ixp425_do_pending(void);
int oldirqstate, hwpend;
/* Don't let the compiler re-order this code with preceding code */
__insn_barrier();
current_spl_level = new;
hwpend = (ixp425_ipending & IXP425_INT_HWMASK) & ~new;
@ -96,6 +99,9 @@ ixp425_splraise(int ipl)
old = current_spl_level;
current_spl_level |= ixp425_imask[ipl];
/* Don't let the compiler re-order this code with subsequent code */
__insn_barrier();
return (old);
}