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

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relative to the code they're supposed to protect.
This commit is contained in:
chris 2006-04-16 23:31:54 +00:00
parent 94c889ba30
commit c75aeaa653
1 changed files with 7 additions and 1 deletions
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8
sys/arch/arm/footbridge/footbridge_intr.h
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@ -1,4 +1,4 @@
/* $NetBSD: footbridge_intr.h,v 1.7 2006/01/01 14:24:33 yamt Exp $ */ /* $NetBSD: footbridge_intr.h,v 1.8 2006/04/16 23:31:54 chris Exp $ */
/* /*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc. * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
@ -106,6 +106,9 @@ footbridge_splx(int newspl)
extern void footbridge_do_pending(void); extern void footbridge_do_pending(void);
int oldirqstate, hwpend; int oldirqstate, hwpend;
/* Don't let the compiler re-order this code with preceding code */
__insn_barrier();
current_spl_level = newspl; current_spl_level = newspl;
hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl; hwpend = (footbridge_ipending & ICU_INT_HWMASK) & ~newspl;
@ -130,6 +133,9 @@ footbridge_splraise(int ipl)
old = current_spl_level; old = current_spl_level;
current_spl_level |= footbridge_imask[ipl]; current_spl_level |= footbridge_imask[ipl];
/* Don't let the compiler re-order this code with subsequent code */
__insn_barrier();
return (old); return (old);
} }