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authorSudeep Holla <sudeep.holla@arm.com>2014-09-30 14:48:22 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-07 11:45:00 -0800
commit5aaba36318e5995e8c95d077a46d9a4d00fcc1cd (patch)
treeedf9eb1ea758b82f1f04963a0fc54fab8bc8bc50 /drivers
parent0372ffb35d00288802265586a29c117911d02fb8 (diff)
downloadlinux-5aaba36318e5995e8c95d077a46d9a4d00fcc1cd.tar.gz
linux-5aaba36318e5995e8c95d077a46d9a4d00fcc1cd.tar.xz
cpumask: factor out show_cpumap into separate helper function
Many sysfs *_show function use cpu{list,mask}_scnprintf to copy cpumap to the buffer aligned to PAGE_SIZE, append '\n' and '\0' to return null terminated buffer with newline. This patch creates a new helper function cpumap_print_to_pagebuf in cpumask.h using newly added bitmap_print_to_pagebuf and consolidates most of those sysfs functions using the new helper function. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Suggested-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: x86@kernel.org Cc: linux-acpi@vger.kernel.org Cc: linux-pci@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/acpi_pad.c8
-rw-r--r--drivers/base/cpu.c5
-rw-r--r--drivers/base/node.c14
-rw-r--r--drivers/base/topology.c22
-rw-r--r--drivers/pci/pci-sysfs.c39
5 files changed, 20 insertions, 68 deletions
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index f148a0580e04..c7b105c0e1d3 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -350,12 +350,10 @@ static ssize_t acpi_pad_idlecpus_store(struct device *dev,
static ssize_t acpi_pad_idlecpus_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int n = 0;
- n = cpumask_scnprintf(buf, PAGE_SIZE-2, to_cpumask(pad_busy_cpus_bits));
- buf[n++] = '\n';
- buf[n] = '\0';
- return n;
+ return cpumap_print_to_pagebuf(false, buf,
+ to_cpumask(pad_busy_cpus_bits));
}
+
static DEVICE_ATTR(idlecpus, S_IRUGO|S_IWUSR,
acpi_pad_idlecpus_show,
acpi_pad_idlecpus_store);
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 006b1bc5297d..4d8a56406fbb 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -207,11 +207,8 @@ static ssize_t show_cpus_attr(struct device *dev,
char *buf)
{
struct cpu_attr *ca = container_of(attr, struct cpu_attr, attr);
- int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *(ca->map));
- buf[n++] = '\n';
- buf[n] = '\0';
- return n;
+ return cpumap_print_to_pagebuf(true, buf, *ca->map);
}
#define _CPU_ATTR(name, map) \
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 472168cd0c97..a3b82e9c7f20 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -25,32 +25,26 @@ static struct bus_type node_subsys = {
};
-static ssize_t node_read_cpumap(struct device *dev, int type, char *buf)
+static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)
{
struct node *node_dev = to_node(dev);
const struct cpumask *mask = cpumask_of_node(node_dev->dev.id);
- int len;
/* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */
BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));
- len = type?
- cpulist_scnprintf(buf, PAGE_SIZE-2, mask) :
- cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
- buf[len++] = '\n';
- buf[len] = '\0';
- return len;
+ return cpumap_print_to_pagebuf(list, buf, mask);
}
static inline ssize_t node_read_cpumask(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return node_read_cpumap(dev, 0, buf);
+ return node_read_cpumap(dev, false, buf);
}
static inline ssize_t node_read_cpulist(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return node_read_cpumap(dev, 1, buf);
+ return node_read_cpumap(dev, true, buf);
}
static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index be7c1fb7c0c9..f7c353843ddf 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -42,29 +42,11 @@ static ssize_t show_##name(struct device *dev, \
return sprintf(buf, "%d\n", topology_##name(dev->id)); \
}
-#if defined(topology_thread_cpumask) || defined(topology_core_cpumask) || \
- defined(topology_book_cpumask)
-static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf)
-{
- ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
- int n = 0;
-
- if (len > 1) {
- n = type?
- cpulist_scnprintf(buf, len-2, mask) :
- cpumask_scnprintf(buf, len-2, mask);
- buf[n++] = '\n';
- buf[n] = '\0';
- }
- return n;
-}
-#endif
-
#define define_siblings_show_map(name) \
static ssize_t show_##name(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
- return show_cpumap(0, topology_##name(dev->id), buf); \
+ return cpumap_print_to_pagebuf(false, buf, topology_##name(dev->id));\
}
#define define_siblings_show_list(name) \
@@ -72,7 +54,7 @@ static ssize_t show_##name##_list(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
- return show_cpumap(1, topology_##name(dev->id), buf); \
+ return cpumap_print_to_pagebuf(true, buf, topology_##name(dev->id));\
}
#define define_siblings_show_func(name) \
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 2c6643fdc0cf..368bdac42603 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -77,11 +77,10 @@ static ssize_t broken_parity_status_store(struct device *dev,
}
static DEVICE_ATTR_RW(broken_parity_status);
-static ssize_t pci_dev_show_local_cpu(struct device *dev, int type,
+static ssize_t pci_dev_show_local_cpu(struct device *dev, bool list,
struct device_attribute *attr, char *buf)
{
const struct cpumask *mask;
- int len;
#ifdef CONFIG_NUMA
mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
@@ -89,59 +88,41 @@ static ssize_t pci_dev_show_local_cpu(struct device *dev, int type,
#else
mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
#endif
- len = type ?
- cpumask_scnprintf(buf, PAGE_SIZE-2, mask) :
- cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
-
- buf[len++] = '\n';
- buf[len] = '\0';
- return len;
+ return cpumap_print_to_pagebuf(list, buf, mask);
}
static ssize_t local_cpus_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return pci_dev_show_local_cpu(dev, 1, attr, buf);
+ return pci_dev_show_local_cpu(dev, false, attr, buf);
}
static DEVICE_ATTR_RO(local_cpus);
static ssize_t local_cpulist_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return pci_dev_show_local_cpu(dev, 0, attr, buf);
+ return pci_dev_show_local_cpu(dev, true, attr, buf);
}
static DEVICE_ATTR_RO(local_cpulist);
/*
* PCI Bus Class Devices
*/
-static ssize_t pci_bus_show_cpuaffinity(struct device *dev, int type,
- struct device_attribute *attr,
- char *buf)
-{
- int ret;
- const struct cpumask *cpumask;
-
- cpumask = cpumask_of_pcibus(to_pci_bus(dev));
- ret = type ?
- cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
- cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
- buf[ret++] = '\n';
- buf[ret] = '\0';
- return ret;
-}
-
static ssize_t cpuaffinity_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
+ const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev));
+
+ return cpumap_print_to_pagebuf(false, buf, cpumask);
}
static DEVICE_ATTR_RO(cpuaffinity);
static ssize_t cpulistaffinity_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
+ const struct cpumask *cpumask = cpumask_of_pcibus(to_pci_bus(dev));
+
+ return cpumap_print_to_pagebuf(true, buf, cpumask);
}
static DEVICE_ATTR_RO(cpulistaffinity);