aboutsummaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug14
-rw-r--r--lib/debugobjects.c31
-rw-r--r--lib/iommu-helper.c5
-rw-r--r--lib/kobject.c3
-rw-r--r--lib/lmb.c2
-rw-r--r--lib/scatterlist.c4
-rw-r--r--lib/swiotlb.c49
-rw-r--r--lib/vsprintf.c11
8 files changed, 64 insertions, 55 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 800ac848554..0b504814e37 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -394,7 +394,7 @@ config LOCKDEP
bool
depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
select STACKTRACE
- select FRAME_POINTER if !X86 && !MIPS
+ select FRAME_POINTER if !X86 && !MIPS && !PPC
select KALLSYMS
select KALLSYMS_ALL
@@ -676,13 +676,13 @@ config FAULT_INJECTION_STACKTRACE_FILTER
depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
depends on !X86_64
select STACKTRACE
- select FRAME_POINTER
+ select FRAME_POINTER if !PPC
help
Provide stacktrace filter for fault-injection capabilities
config LATENCYTOP
bool "Latency measuring infrastructure"
- select FRAME_POINTER if !MIPS
+ select FRAME_POINTER if !MIPS && !PPC
select KALLSYMS
select KALLSYMS_ALL
select STACKTRACE
@@ -693,6 +693,14 @@ config LATENCYTOP
Enable this option if you want to use the LatencyTOP tool
to find out which userspace is blocking on what kernel operations.
+config SYSCTL_SYSCALL_CHECK
+ bool "Sysctl checks"
+ depends on SYSCTL_SYSCALL
+ ---help---
+ sys_sysctl uses binary paths that have been found challenging
+ to properly maintain and use. This enables checks that help
+ you to keep things correct.
+
source kernel/trace/Kconfig
config PROVIDE_OHCI1394_DMA_INIT
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 45a6bde762d..e3ab374e133 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -112,6 +112,7 @@ static struct debug_obj *lookup_object(void *addr, struct debug_bucket *b)
/*
* Allocate a new object. If the pool is empty, switch off the debugger.
+ * Must be called with interrupts disabled.
*/
static struct debug_obj *
alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr)
@@ -148,17 +149,18 @@ alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr)
static void free_object(struct debug_obj *obj)
{
unsigned long idx = (unsigned long)(obj - obj_static_pool);
+ unsigned long flags;
if (obj_pool_free < ODEBUG_POOL_SIZE || idx < ODEBUG_POOL_SIZE) {
- spin_lock(&pool_lock);
+ spin_lock_irqsave(&pool_lock, flags);
hlist_add_head(&obj->node, &obj_pool);
obj_pool_free++;
obj_pool_used--;
- spin_unlock(&pool_lock);
+ spin_unlock_irqrestore(&pool_lock, flags);
} else {
- spin_lock(&pool_lock);
+ spin_lock_irqsave(&pool_lock, flags);
obj_pool_used--;
- spin_unlock(&pool_lock);
+ spin_unlock_irqrestore(&pool_lock, flags);
kmem_cache_free(obj_cache, obj);
}
}
@@ -171,6 +173,7 @@ static void debug_objects_oom(void)
{
struct debug_bucket *db = obj_hash;
struct hlist_node *node, *tmp;
+ HLIST_HEAD(freelist);
struct debug_obj *obj;
unsigned long flags;
int i;
@@ -179,11 +182,14 @@ static void debug_objects_oom(void)
for (i = 0; i < ODEBUG_HASH_SIZE; i++, db++) {
spin_lock_irqsave(&db->lock, flags);
- hlist_for_each_entry_safe(obj, node, tmp, &db->list, node) {
+ hlist_move_list(&db->list, &freelist);
+ spin_unlock_irqrestore(&db->lock, flags);
+
+ /* Now free them */
+ hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) {
hlist_del(&obj->node);
free_object(obj);
}
- spin_unlock_irqrestore(&db->lock, flags);
}
}
@@ -498,8 +504,9 @@ void debug_object_free(void *addr, struct debug_obj_descr *descr)
return;
default:
hlist_del(&obj->node);
+ spin_unlock_irqrestore(&db->lock, flags);
free_object(obj);
- break;
+ return;
}
out_unlock:
spin_unlock_irqrestore(&db->lock, flags);
@@ -510,6 +517,7 @@ static void __debug_check_no_obj_freed(const void *address, unsigned long size)
{
unsigned long flags, oaddr, saddr, eaddr, paddr, chunks;
struct hlist_node *node, *tmp;
+ HLIST_HEAD(freelist);
struct debug_obj_descr *descr;
enum debug_obj_state state;
struct debug_bucket *db;
@@ -545,11 +553,18 @@ repeat:
goto repeat;
default:
hlist_del(&obj->node);
- free_object(obj);
+ hlist_add_head(&obj->node, &freelist);
break;
}
}
spin_unlock_irqrestore(&db->lock, flags);
+
+ /* Now free them */
+ hlist_for_each_entry_safe(obj, node, tmp, &freelist, node) {
+ hlist_del(&obj->node);
+ free_object(obj);
+ }
+
if (cnt > debug_objects_maxchain)
debug_objects_maxchain = cnt;
}
diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index a3b8d4c3f77..5d90074dca7 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -30,8 +30,7 @@ again:
return index;
}
-static inline void set_bit_area(unsigned long *map, unsigned long i,
- int len)
+void iommu_area_reserve(unsigned long *map, unsigned long i, int len)
{
unsigned long end = i + len;
while (i < end) {
@@ -64,7 +63,7 @@ again:
start = index + 1;
goto again;
}
- set_bit_area(map, index, nr);
+ iommu_area_reserve(map, index, nr);
}
return index;
}
diff --git a/lib/kobject.c b/lib/kobject.c
index bd732ffebc8..fbf0ae28237 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -223,8 +223,7 @@ static int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
return -ENOMEM;
/* ewww... some of these buggers have '/' in the name ... */
- s = strchr(kobj->name, '/');
- if (s)
+ while ((s = strchr(kobj->name, '/')))
s[0] = '!';
kfree(old_name);
diff --git a/lib/lmb.c b/lib/lmb.c
index 5d7b9286503..97e54703708 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -462,6 +462,8 @@ void __init lmb_enforce_memory_limit(u64 memory_limit)
if (lmb.memory.region[0].size < lmb.rmo_size)
lmb.rmo_size = lmb.memory.region[0].size;
+ memory_limit = lmb_end_of_DRAM();
+
/* And truncate any reserves above the limit also. */
for (i = 0; i < lmb.reserved.cnt; i++) {
p = &lmb.reserved.region[i];
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 876ba6d5b67..8d2688ff135 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -422,9 +422,12 @@ static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents,
{
unsigned int offset = 0;
struct sg_mapping_iter miter;
+ unsigned long flags;
sg_miter_start(&miter, sgl, nents, SG_MITER_ATOMIC);
+ local_irq_save(flags);
+
while (sg_miter_next(&miter) && offset < buflen) {
unsigned int len;
@@ -442,6 +445,7 @@ static size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents,
sg_miter_stop(&miter);
+ local_irq_restore(flags);
return offset;
}
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 977edbdbc1d..f8eebd48914 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -274,13 +274,14 @@ cleanup1:
}
static int
-address_needs_mapping(struct device *hwdev, dma_addr_t addr)
+address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
{
- dma_addr_t mask = 0xffffffff;
- /* If the device has a mask, use it, otherwise default to 32 bits */
- if (hwdev && hwdev->dma_mask)
- mask = *hwdev->dma_mask;
- return (addr & ~mask) != 0;
+ return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
+}
+
+static int is_swiotlb_buffer(char *addr)
+{
+ return addr >= io_tlb_start && addr < io_tlb_end;
}
/*
@@ -467,15 +468,8 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
void *ret;
int order = get_order(size);
- /*
- * XXX fix me: the DMA API should pass us an explicit DMA mask
- * instead, or use ZONE_DMA32 (ia64 overloads ZONE_DMA to be a ~32
- * bit range instead of a 16MB one).
- */
- flags |= GFP_DMA;
-
ret = (void *)__get_free_pages(flags, order);
- if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) {
+ if (ret && address_needs_mapping(hwdev, virt_to_bus(ret), size)) {
/*
* The allocated memory isn't reachable by the device.
* Fall back on swiotlb_map_single().
@@ -490,19 +484,16 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
* swiotlb_map_single(), which will grab memory from
* the lowest available address range.
*/
- dma_addr_t handle;
- handle = swiotlb_map_single(NULL, NULL, size, DMA_FROM_DEVICE);
- if (swiotlb_dma_mapping_error(hwdev, handle))
+ ret = map_single(hwdev, NULL, size, DMA_FROM_DEVICE);
+ if (!ret)
return NULL;
-
- ret = bus_to_virt(handle);
}
memset(ret, 0, size);
dev_addr = virt_to_bus(ret);
/* Confirm address can be DMA'd by device */
- if (address_needs_mapping(hwdev, dev_addr)) {
+ if (address_needs_mapping(hwdev, dev_addr, size)) {
printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
(unsigned long long)*hwdev->dma_mask,
(unsigned long long)dev_addr);
@@ -518,12 +509,11 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
WARN_ON(irqs_disabled());
- if (!(vaddr >= (void *)io_tlb_start
- && vaddr < (void *)io_tlb_end))
+ if (!is_swiotlb_buffer(vaddr))
free_pages((unsigned long) vaddr, get_order(size));
else
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
- swiotlb_unmap_single (hwdev, dma_handle, size, DMA_TO_DEVICE);
+ unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
}
static void
@@ -567,7 +557,7 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
* we can safely return the device addr and not worry about bounce
* buffering it.
*/
- if (!address_needs_mapping(hwdev, dev_addr) && !swiotlb_force)
+ if (!address_needs_mapping(hwdev, dev_addr, size) && !swiotlb_force)
return dev_addr;
/*
@@ -584,7 +574,7 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
/*
* Ensure that the address returned is DMA'ble
*/
- if (address_needs_mapping(hwdev, dev_addr))
+ if (address_needs_mapping(hwdev, dev_addr, size))
panic("map_single: bounce buffer is not DMA'ble");
return dev_addr;
@@ -612,7 +602,7 @@ swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = bus_to_virt(dev_addr);
BUG_ON(dir == DMA_NONE);
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
+ if (is_swiotlb_buffer(dma_addr))
unmap_single(hwdev, dma_addr, size, dir);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
@@ -642,7 +632,7 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = bus_to_virt(dev_addr);
BUG_ON(dir == DMA_NONE);
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
+ if (is_swiotlb_buffer(dma_addr))
sync_single(hwdev, dma_addr, size, dir, target);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
@@ -673,7 +663,7 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = bus_to_virt(dev_addr) + offset;
BUG_ON(dir == DMA_NONE);
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
+ if (is_swiotlb_buffer(dma_addr))
sync_single(hwdev, dma_addr, size, dir, target);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
@@ -727,7 +717,8 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
for_each_sg(sgl, sg, nelems, i) {
addr = SG_ENT_VIRT_ADDRESS(sg);
dev_addr = virt_to_bus(addr);
- if (swiotlb_force || address_needs_mapping(hwdev, dev_addr)) {
+ if (swiotlb_force ||
+ address_needs_mapping(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, addr, sg->length, dir);
if (!map) {
/* Don't panic here, we expect map_sg users
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index d8d1d114224..c399bc1093c 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -27,6 +27,7 @@
#include <asm/page.h> /* for PAGE_SIZE */
#include <asm/div64.h>
+#include <asm/sections.h> /* for dereference_function_descriptor() */
/* Works only for digits and letters, but small and fast */
#define TOLOWER(x) ((x) | 0x20)
@@ -513,16 +514,6 @@ static char *string(char *buf, char *end, char *s, int field_width, int precisio
return buf;
}
-static inline void *dereference_function_descriptor(void *ptr)
-{
-#if defined(CONFIG_IA64) || defined(CONFIG_PPC64)
- void *p;
- if (!probe_kernel_address(ptr, p))
- ptr = p;
-#endif
- return ptr;
-}
-
static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags)
{
unsigned long value = (unsigned long) ptr;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-02-17 10:08:40 +0000