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linux-sg2042
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Merge branch 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 

* 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  dma-debug: Fix the overlap() function to be correct and readable
  oprofile: reset bt_lost_no_mapping with other stats
  x86/oprofile: rename kernel parameter for architectural perfmon to arch_perfmon
  signals: declare sys_rt_tgsigqueueinfo in syscalls.h
  rcu: Mark Hierarchical RCU no longer experimental
  dma-debug: Put all hash-chain locks into the same lock class
  dma-debug: fix off-by-one error in overlap function
This commit is contained in:
Linus Torvalds 2009-07-10 14:25:59 -07:00
parent 85be928c41 f39d1b9792
commit ac3f482236
6 changed files with 20 additions and 18 deletions
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4
Documentation/kernel-parameters.txt
View File

@ -1720,8 +1720,8 @@ and is between 256 and 4096 characters. It is defined in the file
oprofile.cpu_type= Force an oprofile cpu type
This might be useful if you have an older oprofile
userland or if you want common events.
Format: { archperfmon }
archperfmon: [X86] Force use of architectural
Format: { arch_perfmon }
arch_perfmon: [X86] Force use of architectural
perfmon on Intel CPUs instead of the
CPU specific event set.

2
arch/x86/oprofile/nmi_int.c
View File

@ -390,7 +390,7 @@ static int __init p4_init(char **cpu_type)
static int force_arch_perfmon;
static int force_cpu_type(const char *str, struct kernel_param *kp)
{
if (!strcmp(str, "archperfmon")) {
if (!strcmp(str, "arch_perfmon")) {
force_arch_perfmon = 1;
printk(KERN_INFO "oprofile: forcing architectural perfmon\n");
}

1
drivers/oprofile/oprofile_stats.c
View File

@ -33,6 +33,7 @@ void oprofile_reset_stats(void)
atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
atomic_set(&oprofile_stats.event_lost_overflow, 0);
atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
}

2
include/linux/syscalls.h
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@ -321,6 +321,8 @@ asmlinkage long sys_rt_sigtimedwait(const sigset_t __user *uthese,
siginfo_t __user *uinfo,
const struct timespec __user *uts,
size_t sigsetsize);
asmlinkage long sys_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig,
siginfo_t __user *uinfo);
asmlinkage long sys_kill(int pid, int sig);
asmlinkage long sys_tgkill(int tgid, int pid, int sig);
asmlinkage long sys_tkill(int pid, int sig);

3
kernel/rcutree.c
View File

@ -1533,7 +1533,7 @@ void __init __rcu_init(void)
int j;
struct rcu_node *rnp;
printk(KERN_WARNING "Experimental hierarchical RCU implementation.\n");
printk(KERN_INFO "Hierarchical RCU implementation.\n");
#ifdef CONFIG_RCU_CPU_STALL_DETECTOR
printk(KERN_INFO "RCU-based detection of stalled CPUs is enabled.\n");
#endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
@ -1546,7 +1546,6 @@ void __init __rcu_init(void)
rcu_cpu_notify(&rcu_nb, CPU_UP_PREPARE, (void *)(long)i);
/* Register notifier for non-boot CPUs */
register_cpu_notifier(&rcu_nb);
printk(KERN_WARNING "Experimental hierarchical RCU init done.\n");
}
module_param(blimit, int, 0);

26
lib/dma-debug.c
View File

@ -716,7 +716,7 @@ void dma_debug_init(u32 num_entries)
for (i = 0; i < HASH_SIZE; ++i) {
INIT_LIST_HEAD(&dma_entry_hash[i].list);
dma_entry_hash[i].lock = SPIN_LOCK_UNLOCKED;
spin_lock_init(&dma_entry_hash[i].lock);
}
if (dma_debug_fs_init() != 0) {
@ -856,22 +856,21 @@ static void check_for_stack(struct device *dev, void *addr)
"stack [addr=%p]\n", addr);
}
static inline bool overlap(void *addr, u64 size, void *start, void *end)
static inline bool overlap(void *addr, unsigned long len, void *start, void *end)
{
void *addr2 = (char *)addr + size;
unsigned long a1 = (unsigned long)addr;
unsigned long b1 = a1 + len;
unsigned long a2 = (unsigned long)start;
unsigned long b2 = (unsigned long)end;
return ((addr >= start && addr < end) ||
(addr2 >= start && addr2 < end) ||
((addr < start) && (addr2 >= end)));
return !(b1 <= a2 || a1 >= b2);
}
static void check_for_illegal_area(struct device *dev, void *addr, u64 size)
static void check_for_illegal_area(struct device *dev, void *addr, unsigned long len)
{
if (overlap(addr, size, _text, _etext) ||
overlap(addr, size, __start_rodata, __end_rodata))
err_printk(dev, NULL, "DMA-API: device driver maps "
"memory from kernel text or rodata "
"[addr=%p] [size=%llu]\n", addr, size);
if (overlap(addr, len, _text, _etext) ||
overlap(addr, len, __start_rodata, __end_rodata))
err_printk(dev, NULL, "DMA-API: device driver maps memory from kernel text or rodata [addr=%p] [len=%lu]\n", addr, len);
}
static void check_sync(struct device *dev,
@ -969,7 +968,8 @@ void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
entry->type = dma_debug_single;
if (!PageHighMem(page)) {
void *addr = ((char *)page_address(page)) + offset;
void *addr = page_address(page) + offset;
check_for_stack(dev, addr);
check_for_illegal_area(dev, addr, size);
}