Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=28c670cb9b0df7c8579f78c9d06e148896378cf4
Commit: 28c670cb9b0df7c8579f78c9d06e148896378cf4
Parent: 5b10c8e436b69f25b6dcb5586bbdc5e39c20ed1d
Author: Russell King <[EMAIL PROTECTED]>
AuthorDate: Sat May 26 12:08:29 2007 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Wed May 30 13:15:15 2007 +0100
[ARM] oprofile: avoid lockdep warnings on mpcore oprofile init
Fix lockdep warnings, caused by 'set_affinity' being called without
the correct locks taken and local interrupts disabled:
=================================
[ INFO: inconsistent lock state ]
2.6.22-rc2 #1
---------------------------------
inconsistent {in-hardirq-W} -> {hardirq-on-W} usage.
swapper/1 [HC0[0]:SC0[0]:HE1:SE1] takes:
(irq_controller_lock){++..}, at: [<c002be50>] gic_set_cpu+0x60/0xa0
{in-hardirq-W} state was registered at:
[<c005d9a8>] lock_acquire+0x58/0x6c
[<c0233068>] _spin_lock+0x40/0x50
[<c002c020>] gic_mask_irq+0x2c/0x6c
[<c0069c64>] handle_level_irq+0x11c/0x14c
[<c0020060>] asm_do_IRQ+0x60/0x84
[<c0020d2c>] __irq_svc+0x4c/0xc0
[<c000ed84>] __alloc_bootmem_nopanic+0x74/0x88
[<c000edb0>] __alloc_bootmem+0x18/0x3c
[<c000fa00>] alloc_large_system_hash+0x16c/0x200
[<c00108dc>] inode_init_early+0x5c/0xa4
[<c00106dc>] vfs_caches_init_early+0x24/0xa0
[<c0008e54>] start_kernel+0x220/0x2fc
[<00008078>] 0x8078
irq event stamp: 88438
hardirqs last enabled at (88438): [<c0020dc0>] preempt_return+0x20/0x2c
hardirqs last disabled at (88436): [<c00417bc>] __do_softirq+0xb0/0x138
softirqs last enabled at (88437): [<c0041810>] __do_softirq+0x104/0x138
softirqs last disabled at (88428): [<c0041d9c>] irq_exit+0x68/0x7c
other info that might help us debug this:
no locks held by swapper/1.
stack backtrace:
[<c0025ecc>] (dump_stack+0x0/0x14) from [<c005b1e4>]
(print_usage_bug+0x138/0x168)
[<c005b0ac>] (print_usage_bug+0x0/0x168) from [<c005be80>]
(mark_lock+0x484/0x6a0)
[<c005b9fc>] (mark_lock+0x0/0x6a0) from [<c005cc48>]
(__lock_acquire+0x3c0/0x10c8)
[<c005c888>] (__lock_acquire+0x0/0x10c8) from [<c005d9a8>]
(lock_acquire+0x58/0x6c)
[<c005d950>] (lock_acquire+0x0/0x6c) from [<c0233068>]
(_spin_lock+0x40/0x50)
[<c0233028>] (_spin_lock+0x0/0x50) from [<c002be50>] (gic_set_cpu+0x60/0xa0)
[<c002bdf0>] (gic_set_cpu+0x0/0xa0) from [<c01b04cc>]
(em_route_irq+0x38/0x40)
[<c01b0494>] (em_route_irq+0x0/0x40) from [<c01b04ec>] (em_setup+0x18/0xa4)
[<c01b04d4>] (em_setup+0x0/0xa4) from [<c001570c>]
(oprofile_arch_init+0x24/0xe8)
[<c00156e8>] (oprofile_arch_init+0x0/0xe8) from [<c0015640>]
(oprofile_init+0x1c/0x64)
[<c0015624>] (oprofile_init+0x0/0x64) from [<c0008a20>]
(kernel_init+0x154/0x368)
[<c00088cc>] (kernel_init+0x0/0x368) from [<c003ef34>] (do_exit+0x0/0x904)
oprofile: using arm/mpcore
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
arch/arm/oprofile/op_model_mpcore.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/arm/oprofile/op_model_mpcore.c
b/arch/arm/oprofile/op_model_mpcore.c
index 8985007..7791da7 100644
--- a/arch/arm/oprofile/op_model_mpcore.c
+++ b/arch/arm/oprofile/op_model_mpcore.c
@@ -257,8 +257,13 @@ static void em_stop(void)
*/
static void em_route_irq(int irq, unsigned int cpu)
{
- irq_desc[irq].affinity = cpumask_of_cpu(cpu);
- irq_desc[irq].chip->set_affinity(irq, cpumask_of_cpu(cpu));
+ struct irq_desc *desc = irq_desc + irq;
+ cpumask_t mask = cpumask_of_cpu(cpu);
+
+ spin_lock_irq(&desc->lock);
+ desc->affinity = mask;
+ desc->chip->set_affinity(irq, mask);
+ spin_unlock_irq(&desc->lock);
}
static int em_setup(void)
-
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