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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Clean up use of spin_is_locked() and introduce rw_is_locked().
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1229182090 0
# Node ID e767f80d4bcc90d761df14ba89c2d72d44c99d8b
# Parent db0c6d297d006c86056a45343e29be962595f211
Clean up use of spin_is_locked() and introduce rw_is_locked().
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
xen/arch/x86/irq.c | 4 ++--
xen/arch/x86/msi.c | 10 +++++-----
xen/common/spinlock.c | 6 ++++++
xen/drivers/passthrough/iommu.c | 2 +-
xen/drivers/passthrough/pci.c | 4 ++--
xen/drivers/passthrough/vtd/iommu.c | 16 ++++++++--------
xen/include/asm-ia64/linux-xen/asm/spinlock.h | 2 ++
xen/include/asm-x86/spinlock.h | 5 +++--
xen/include/xen/spinlock.h | 6 +++++-
9 files changed, 34 insertions(+), 21 deletions(-)
diff -r db0c6d297d00 -r e767f80d4bcc xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/arch/x86/irq.c Sat Dec 13 15:28:10 2008 +0000
@@ -850,7 +850,7 @@ int map_domain_pirq(
struct msi_desc *msi_desc;
struct pci_dev *pdev = NULL;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
ASSERT(spin_is_locked(&d->event_lock));
if ( !IS_PRIV(current->domain) )
@@ -930,7 +930,7 @@ int unmap_domain_pirq(struct domain *d,
if ( !IS_PRIV(current->domain) )
return -EINVAL;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
ASSERT(spin_is_locked(&d->event_lock));
vector = d->arch.pirq_vector[pirq];
diff -r db0c6d297d00 -r e767f80d4bcc xen/arch/x86/msi.c
--- a/xen/arch/x86/msi.c Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/arch/x86/msi.c Sat Dec 13 15:28:10 2008 +0000
@@ -440,7 +440,7 @@ static int msi_capability_init(struct pc
u8 slot = PCI_SLOT(dev->devfn);
u8 func = PCI_FUNC(dev->devfn);
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
pos = pci_find_cap_offset(bus, slot, func, PCI_CAP_ID_MSI);
control = pci_conf_read16(bus, slot, func, msi_control_reg(pos));
/* MSI Entry Initialization */
@@ -509,7 +509,7 @@ static int msix_capability_init(struct p
u8 slot = PCI_SLOT(dev->devfn);
u8 func = PCI_FUNC(dev->devfn);
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
ASSERT(desc);
pos = pci_find_cap_offset(bus, slot, func, PCI_CAP_ID_MSIX);
@@ -574,7 +574,7 @@ static int __pci_enable_msi(struct msi_i
int status;
struct pci_dev *pdev;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
pdev = pci_get_pdev(msi->bus, msi->devfn);
if ( !pdev )
return -ENODEV;
@@ -634,7 +634,7 @@ static int __pci_enable_msix(struct msi_
u8 slot = PCI_SLOT(msi->devfn);
u8 func = PCI_FUNC(msi->devfn);
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
pdev = pci_get_pdev(msi->bus, msi->devfn);
if ( !pdev )
return -ENODEV;
@@ -688,7 +688,7 @@ static void __pci_disable_msix(struct ms
*/
int pci_enable_msi(struct msi_info *msi, struct msi_desc **desc)
{
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
return msi->table_base ? __pci_enable_msix(msi, desc) :
__pci_enable_msi(msi, desc);
diff -r db0c6d297d00 -r e767f80d4bcc xen/common/spinlock.c
--- a/xen/common/spinlock.c Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/common/spinlock.c Sat Dec 13 15:28:10 2008 +0000
@@ -215,3 +215,9 @@ void _write_unlock_irqrestore(rwlock_t *
_raw_write_unlock(&lock->raw);
local_irq_restore(flags);
}
+
+int _rw_is_locked(rwlock_t *lock)
+{
+ check_lock(&lock->debug);
+ return _raw_rw_is_locked(&lock->raw);
+}
diff -r db0c6d297d00 -r e767f80d4bcc xen/drivers/passthrough/iommu.c
--- a/xen/drivers/passthrough/iommu.c Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/drivers/passthrough/iommu.c Sat Dec 13 15:28:10 2008 +0000
@@ -87,7 +87,7 @@ int iommu_add_device(struct pci_dev *pde
if ( !pdev->domain )
return -EINVAL;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
hd = domain_hvm_iommu(pdev->domain);
if ( !iommu_enabled || !hd->platform_ops )
diff -r db0c6d297d00 -r e767f80d4bcc xen/drivers/passthrough/pci.c
--- a/xen/drivers/passthrough/pci.c Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/drivers/passthrough/pci.c Sat Dec 13 15:28:10 2008 +0000
@@ -62,7 +62,7 @@ struct pci_dev *pci_get_pdev(int bus, in
{
struct pci_dev *pdev = NULL;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
list_for_each_entry ( pdev, &alldevs_list, alldevs_list )
if ( (pdev->bus == bus || bus == -1) &&
@@ -78,7 +78,7 @@ struct pci_dev *pci_get_pdev_by_domain(s
{
struct pci_dev *pdev = NULL;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
list_for_each_entry ( pdev, &alldevs_list, alldevs_list )
if ( (pdev->bus == bus || bus == -1) &&
diff -r db0c6d297d00 -r e767f80d4bcc xen/drivers/passthrough/vtd/iommu.c
--- a/xen/drivers/passthrough/vtd/iommu.c Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/drivers/passthrough/vtd/iommu.c Sat Dec 13 15:28:10 2008 +0000
@@ -1037,7 +1037,7 @@ static int domain_context_mapping_one(
struct pci_dev *pdev = NULL;
int agaw;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
spin_lock(&iommu->lock);
maddr = bus_to_context_maddr(iommu, bus);
context_entries = (struct context_entry *)map_vtd_domain_page(maddr);
@@ -1214,7 +1214,7 @@ static int domain_context_mapping(struct
if ( !drhd )
return -ENODEV;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
type = pdev_type(bus, devfn);
switch ( type )
@@ -1298,7 +1298,7 @@ static int domain_context_unmap_one(
struct context_entry *context, *context_entries;
u64 maddr;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
spin_lock(&iommu->lock);
maddr = bus_to_context_maddr(iommu, bus);
@@ -1388,7 +1388,7 @@ static int reassign_device_ownership(
struct iommu *pdev_iommu;
int ret, found = 0;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
pdev = pci_get_pdev_by_domain(source, bus, devfn);
if (!pdev)
@@ -1428,7 +1428,7 @@ void iommu_domain_teardown(struct domain
if ( list_empty(&acpi_drhd_units) )
return;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
spin_lock(&hd->mapping_lock);
iommu_free_pagetable(hd->pgd_maddr, agaw_to_level(hd->agaw));
hd->pgd_maddr = 0;
@@ -1518,7 +1518,7 @@ static int iommu_prepare_rmrr_dev(struct
u64 base, end;
unsigned long base_pfn, end_pfn;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
ASSERT(rmrr->base_address < rmrr->end_address);
base = rmrr->base_address & PAGE_MASK_4K;
@@ -1543,7 +1543,7 @@ static int intel_iommu_add_device(struct
u16 bdf;
int ret, i;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
if ( !pdev->domain )
return -EINVAL;
@@ -1782,7 +1782,7 @@ int intel_iommu_assign_device(struct dom
if ( list_empty(&acpi_drhd_units) )
return -ENODEV;
- ASSERT(spin_is_locked(&pcidevs_lock));
+ ASSERT(rw_is_locked(&pcidevs_lock));
pdev = pci_get_pdev(bus, devfn);
if (!pdev)
return -ENODEV;
diff -r db0c6d297d00 -r e767f80d4bcc
xen/include/asm-ia64/linux-xen/asm/spinlock.h
--- a/xen/include/asm-ia64/linux-xen/asm/spinlock.h Sat Dec 13 15:04:53
2008 +0000
+++ b/xen/include/asm-ia64/linux-xen/asm/spinlock.h Sat Dec 13 15:28:10
2008 +0000
@@ -216,4 +216,6 @@ do {
\
clear_bit(31, (x));
\
})
+#define _raw_rw_is_locked(x) (*(int *)(x) != 0)
+
#endif /* _ASM_IA64_SPINLOCK_H */
diff -r db0c6d297d00 -r e767f80d4bcc xen/include/asm-x86/spinlock.h
--- a/xen/include/asm-x86/spinlock.h Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/include/asm-x86/spinlock.h Sat Dec 13 15:28:10 2008 +0000
@@ -12,8 +12,7 @@ typedef struct {
#define _RAW_SPIN_LOCK_UNLOCKED /*(raw_spinlock_t)*/ { 1 }
-#define _raw_spin_is_locked(x) \
- (*(volatile char *)(&(x)->lock) <= 0)
+#define _raw_spin_is_locked(x) ((x)->lock <= 0)
static always_inline void _raw_spin_lock(raw_spinlock_t *lock)
{
@@ -75,4 +74,6 @@ static always_inline void _raw_write_loc
"lock ; addl $" RW_LOCK_BIAS_STR ",%0" : \
"=m" ((rw)->lock) : : "memory" )
+#define _raw_rw_is_locked(x) ((x)->lock < RW_LOCK_BIAS)
+
#endif /* __ASM_SPINLOCK_H */
diff -r db0c6d297d00 -r e767f80d4bcc xen/include/xen/spinlock.h
--- a/xen/include/xen/spinlock.h Sat Dec 13 15:04:53 2008 +0000
+++ b/xen/include/xen/spinlock.h Sat Dec 13 15:28:10 2008 +0000
@@ -72,6 +72,8 @@ void _write_unlock_irq(rwlock_t *lock);
void _write_unlock_irq(rwlock_t *lock);
void _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags);
+int _rw_is_locked(rwlock_t *lock);
+
#define spin_lock(l) _spin_lock(l)
#define spin_lock_irq(l) _spin_lock_irq(l)
#define spin_lock_irqsave(l, f) ((f) = _spin_lock_irqsave(l))
@@ -80,7 +82,7 @@ void _write_unlock_irqrestore(rwlock_t *
#define spin_unlock_irq(l) _spin_unlock_irq(l)
#define spin_unlock_irqrestore(l, f) _spin_unlock_irqrestore(l, f)
-#define spin_is_locked(l) _raw_spin_is_locked(&(l)->raw)
+#define spin_is_locked(l) _spin_is_locked(l)
#define spin_trylock(l) _spin_trylock(l)
/* Ensure a lock is quiescent between two critical operations. */
@@ -113,4 +115,6 @@ void _write_unlock_irqrestore(rwlock_t *
#define write_unlock_irq(l) _write_unlock_irq(l)
#define write_unlock_irqrestore(l, f) _write_unlock_irqrestore(l, f)
+#define rw_is_locked(l) _rw_is_locked(l)
+
#endif /* __SPINLOCK_H__ */
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