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authorLinus Torvalds <torvalds@linux-foundation.org>2015-05-01 07:44:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-05-01 07:44:32 -0700
commit036f351e2566eaa5826581c8512dd55f6585ad01 (patch)
treea50de0e08a9379c0ed7cafc75acf55cec0bbdc47
parent4a152c3913fb46fc2e29081d0251862106c3d55f (diff)
parent8291fd04d86b97869bd34e796bcac3141b9d5432 (diff)
downloadlinux-stericsson-036f351e2566eaa5826581c8512dd55f6585ad01.tar.gz
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon: "Not too much here, but we've addressed a couple of nasty issues in the dma-mapping code as well as adding the halfword and byte variants of load_acquire/store_release following on from the CSD locking bug that you fixed in the core. - fix perf devicetree warnings at probe time - fix memory leak in __dma_free() - ensure DMA buffers are always zeroed - show IRQ trigger in /proc/interrupts (for parity with ARM) - implement byte and halfword access for smp_{load_acquire,store_release}" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: perf: Fix the pmu node name in warning message arm64: perf: don't warn about missing interrupt-affinity property for PPIs arm64: add missing PAGE_ALIGN() to __dma_free() arm64: dma-mapping: always clear allocated buffers ARM64: Enable CONFIG_GENERIC_IRQ_SHOW_LEVEL arm64: add missing data types in smp_load_acquire/smp_store_release
-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/include/asm/barrier.h16
-rw-r--r--arch/arm64/kernel/perf_event.c9
-rw-r--r--arch/arm64/mm/dma-mapping.c9
4 files changed, 28 insertions, 7 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 4269dba63cf1..7796af4b1d6f 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -31,6 +31,7 @@ config ARM64
select GENERIC_EARLY_IOREMAP
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
+ select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_PCI_IOMAP
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index a5abb0062d6e..71f19c4dc0de 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -65,6 +65,14 @@ do { \
do { \
compiletime_assert_atomic_type(*p); \
switch (sizeof(*p)) { \
+ case 1: \
+ asm volatile ("stlrb %w1, %0" \
+ : "=Q" (*p) : "r" (v) : "memory"); \
+ break; \
+ case 2: \
+ asm volatile ("stlrh %w1, %0" \
+ : "=Q" (*p) : "r" (v) : "memory"); \
+ break; \
case 4: \
asm volatile ("stlr %w1, %0" \
: "=Q" (*p) : "r" (v) : "memory"); \
@@ -81,6 +89,14 @@ do { \
typeof(*p) ___p1; \
compiletime_assert_atomic_type(*p); \
switch (sizeof(*p)) { \
+ case 1: \
+ asm volatile ("ldarb %w0, %1" \
+ : "=r" (___p1) : "Q" (*p) : "memory"); \
+ break; \
+ case 2: \
+ asm volatile ("ldarh %w0, %1" \
+ : "=r" (___p1) : "Q" (*p) : "memory"); \
+ break; \
case 4: \
asm volatile ("ldar %w0, %1" \
: "=r" (___p1) : "Q" (*p) : "memory"); \
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 195991dadc37..23f25acf43a9 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -1310,7 +1310,7 @@ static const struct of_device_id armpmu_of_device_ids[] = {
static int armpmu_device_probe(struct platform_device *pdev)
{
- int i, *irqs;
+ int i, irq, *irqs;
if (!cpu_pmu)
return -ENODEV;
@@ -1319,6 +1319,11 @@ static int armpmu_device_probe(struct platform_device *pdev)
if (!irqs)
return -ENOMEM;
+ /* Don't bother with PPIs; they're already affine */
+ irq = platform_get_irq(pdev, 0);
+ if (irq >= 0 && irq_is_percpu(irq))
+ return 0;
+
for (i = 0; i < pdev->num_resources; ++i) {
struct device_node *dn;
int cpu;
@@ -1327,7 +1332,7 @@ static int armpmu_device_probe(struct platform_device *pdev)
i);
if (!dn) {
pr_warn("Failed to parse %s/interrupt-affinity[%d]\n",
- of_node_full_name(dn), i);
+ of_node_full_name(pdev->dev.of_node), i);
break;
}
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index ef7d112f5ce0..b0bd4e5fd5cf 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -67,8 +67,7 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page, gfp_t flags)
*ret_page = phys_to_page(phys);
ptr = (void *)val;
- if (flags & __GFP_ZERO)
- memset(ptr, 0, size);
+ memset(ptr, 0, size);
}
return ptr;
@@ -105,7 +104,6 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size,
struct page *page;
void *addr;
- size = PAGE_ALIGN(size);
page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
get_order(size));
if (!page)
@@ -113,8 +111,7 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size,
*dma_handle = phys_to_dma(dev, page_to_phys(page));
addr = page_address(page);
- if (flags & __GFP_ZERO)
- memset(addr, 0, size);
+ memset(addr, 0, size);
return addr;
} else {
return swiotlb_alloc_coherent(dev, size, dma_handle, flags);
@@ -195,6 +192,8 @@ static void __dma_free(struct device *dev, size_t size,
{
void *swiotlb_addr = phys_to_virt(dma_to_phys(dev, dma_handle));
+ size = PAGE_ALIGN(size);
+
if (!is_device_dma_coherent(dev)) {
if (__free_from_pool(vaddr, size))
return;