| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 13 Nov 2014 20:31:01 -0800
From: Florian Fainelli <f.fainelli@...il.com>
To: linux-kernel@...r.kernel.org
Cc: dan.j.williams@...el.com, akpm@...ux-foundation.org,
jkosina@...e.cz, horia.geanta@...escale.com,
computersforpeace@...il.com,
Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH 1/2] dma-debug: introduce dma_debug_disabled
Add a helper function which returns whether the DMA debugging API is
disabled, right now we only check for global_disable, but in order to
accomodate early callers of the DMA-API, we will check for more
initialization flags in the future.
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
lib/dma-debug.c | 37 +++++++++++++++++++++----------------
1 file changed, 21 insertions(+), 16 deletions(-)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index add80cc02dbe..1ac35dbaf8e0 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -102,6 +102,11 @@ static DEFINE_SPINLOCK(free_entries_lock);
/* Global disable flag - will be set in case of an error */
static u32 global_disable __read_mostly;
+static inline bool dma_debug_disabled(void)
+{
+ return global_disable;
+}
+
/* Global error count */
static u32 error_count;
@@ -945,7 +950,7 @@ static int dma_debug_device_change(struct notifier_block *nb, unsigned long acti
struct dma_debug_entry *uninitialized_var(entry);
int count;
- if (global_disable)
+ if (dma_debug_disabled())
return 0;
switch (action) {
@@ -973,7 +978,7 @@ void dma_debug_add_bus(struct bus_type *bus)
{
struct notifier_block *nb;
- if (global_disable)
+ if (dma_debug_disabled())
return;
nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
@@ -994,7 +999,7 @@ void dma_debug_init(u32 num_entries)
{
int i;
- if (global_disable)
+ if (dma_debug_disabled())
return;
for (i = 0; i < HASH_SIZE; ++i) {
@@ -1243,7 +1248,7 @@ void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
{
struct dma_debug_entry *entry;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
if (dma_mapping_error(dev, dma_addr))
@@ -1283,7 +1288,7 @@ void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
struct hash_bucket *bucket;
unsigned long flags;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
ref.dev = dev;
@@ -1325,7 +1330,7 @@ void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
.direction = direction,
};
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
if (map_single)
@@ -1342,7 +1347,7 @@ void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
struct scatterlist *s;
int i;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
for_each_sg(sg, s, mapped_ents, i) {
@@ -1395,7 +1400,7 @@ void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
struct scatterlist *s;
int mapped_ents = 0, i;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
for_each_sg(sglist, s, nelems, i) {
@@ -1427,7 +1432,7 @@ void debug_dma_alloc_coherent(struct device *dev, size_t size,
{
struct dma_debug_entry *entry;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
if (unlikely(virt == NULL))
@@ -1462,7 +1467,7 @@ void debug_dma_free_coherent(struct device *dev, size_t size,
.direction = DMA_BIDIRECTIONAL,
};
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
check_unmap(&ref);
@@ -1474,7 +1479,7 @@ void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
{
struct dma_debug_entry ref;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
ref.type = dma_debug_single;
@@ -1494,7 +1499,7 @@ void debug_dma_sync_single_for_device(struct device *dev,
{
struct dma_debug_entry ref;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
ref.type = dma_debug_single;
@@ -1515,7 +1520,7 @@ void debug_dma_sync_single_range_for_cpu(struct device *dev,
{
struct dma_debug_entry ref;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
ref.type = dma_debug_single;
@@ -1536,7 +1541,7 @@ void debug_dma_sync_single_range_for_device(struct device *dev,
{
struct dma_debug_entry ref;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
ref.type = dma_debug_single;
@@ -1556,7 +1561,7 @@ void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
struct scatterlist *s;
int mapped_ents = 0, i;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
for_each_sg(sg, s, nelems, i) {
@@ -1589,7 +1594,7 @@ void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
struct scatterlist *s;
int mapped_ents = 0, i;
- if (unlikely(global_disable))
+ if (unlikely(dma_debug_disabled()))
return;
for_each_sg(sg, s, nelems, i) {
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists