| Message ID | 20190715143705.117908-9-joel@joelfernandes.org (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | Harden list_for_each_entry_rcu() and family | expand |
On Mon, Jul 15, 2019 at 4:43 PM Joel Fernandes (Google) <joel@joelfernandes.org> wrote: > > list_for_each_entry_rcu has built-in RCU and lock checking. Make use of > it for acpi_ioremaps list traversal. > > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > --- > drivers/acpi/osl.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c > index 9c0edf2fc0dd..2f9d0d20b836 100644 > --- a/drivers/acpi/osl.c > +++ b/drivers/acpi/osl.c > @@ -14,6 +14,7 @@ > #include <linux/slab.h> > #include <linux/mm.h> > #include <linux/highmem.h> > +#include <linux/lockdep.h> > #include <linux/pci.h> > #include <linux/interrupt.h> > #include <linux/kmod.h> > @@ -80,6 +81,7 @@ struct acpi_ioremap { > > static LIST_HEAD(acpi_ioremaps); > static DEFINE_MUTEX(acpi_ioremap_lock); > +#define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map) > > static void __init acpi_request_region (struct acpi_generic_address *gas, > unsigned int length, char *desc) > @@ -206,7 +208,7 @@ acpi_map_lookup(acpi_physical_address phys, acpi_size size) > { > struct acpi_ioremap *map; > > - list_for_each_entry_rcu(map, &acpi_ioremaps, list) > + list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held()) > if (map->phys <= phys && > phys + size <= map->phys + map->size) > return map; > @@ -249,7 +251,7 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size) > { > struct acpi_ioremap *map; > > - list_for_each_entry_rcu(map, &acpi_ioremaps, list) > + list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held()) > if (map->virt <= virt && > virt + size <= map->virt + map->size) > return map; > -- > 2.22.0.510.g264f2c817a-goog >
On Mon, Jul 15, 2019 at 10:37:04AM -0400, Joel Fernandes (Google) wrote: > list_for_each_entry_rcu has built-in RCU and lock checking. Make use of > it for acpi_ioremaps list traversal. > > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Given that Rafael acked it, this one looks ready. Thanx, Paul > --- > drivers/acpi/osl.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c > index 9c0edf2fc0dd..2f9d0d20b836 100644 > --- a/drivers/acpi/osl.c > +++ b/drivers/acpi/osl.c > @@ -14,6 +14,7 @@ > #include <linux/slab.h> > #include <linux/mm.h> > #include <linux/highmem.h> > +#include <linux/lockdep.h> > #include <linux/pci.h> > #include <linux/interrupt.h> > #include <linux/kmod.h> > @@ -80,6 +81,7 @@ struct acpi_ioremap { > > static LIST_HEAD(acpi_ioremaps); > static DEFINE_MUTEX(acpi_ioremap_lock); > +#define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map) > > static void __init acpi_request_region (struct acpi_generic_address *gas, > unsigned int length, char *desc) > @@ -206,7 +208,7 @@ acpi_map_lookup(acpi_physical_address phys, acpi_size size) > { > struct acpi_ioremap *map; > > - list_for_each_entry_rcu(map, &acpi_ioremaps, list) > + list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held()) > if (map->phys <= phys && > phys + size <= map->phys + map->size) > return map; > @@ -249,7 +251,7 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size) > { > struct acpi_ioremap *map; > > - list_for_each_entry_rcu(map, &acpi_ioremaps, list) > + list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held()) > if (map->virt <= virt && > virt + size <= map->virt + map->size) > return map; > -- > 2.22.0.510.g264f2c817a-goog >
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 9c0edf2fc0dd..2f9d0d20b836 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -14,6 +14,7 @@ #include <linux/slab.h> #include <linux/mm.h> #include <linux/highmem.h> +#include <linux/lockdep.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/kmod.h> @@ -80,6 +81,7 @@ struct acpi_ioremap { static LIST_HEAD(acpi_ioremaps); static DEFINE_MUTEX(acpi_ioremap_lock); +#define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map) static void __init acpi_request_region (struct acpi_generic_address *gas, unsigned int length, char *desc) @@ -206,7 +208,7 @@ acpi_map_lookup(acpi_physical_address phys, acpi_size size) { struct acpi_ioremap *map; - list_for_each_entry_rcu(map, &acpi_ioremaps, list) + list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held()) if (map->phys <= phys && phys + size <= map->phys + map->size) return map; @@ -249,7 +251,7 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size) { struct acpi_ioremap *map; - list_for_each_entry_rcu(map, &acpi_ioremaps, list) + list_for_each_entry_rcu(map, &acpi_ioremaps, list, acpi_ioremap_lock_held()) if (map->virt <= virt && virt + size <= map->virt + map->size) return map;
list_for_each_entry_rcu has built-in RCU and lock checking. Make use of it for acpi_ioremaps list traversal. Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> --- drivers/acpi/osl.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)