summaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug28
-rw-r--r--lib/Makefile3
-rw-r--r--lib/atomic64_test.c4
-rw-r--r--lib/bug.c2
-rw-r--r--lib/cpu-notifier-error-inject.c63
-rw-r--r--lib/crc32.c24
-rw-r--r--lib/dynamic_debug.c2
-rw-r--r--lib/gen_crc32table.c47
-rw-r--r--lib/hexdump.c54
-rw-r--r--lib/idr.c5
-rw-r--r--lib/kobject_uevent.c3
-rw-r--r--lib/radix-tree.c4
-rw-r--r--lib/random32.c38
-rw-r--r--lib/swiotlb.c31
-rw-r--r--lib/uuid.c53
-rw-r--r--lib/vsprintf.c69
16 files changed, 296 insertions, 134 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d85be90d588..e722e9d6222 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -898,6 +898,18 @@ config LKDTM
Documentation on how to use the module can be found in
Documentation/fault-injection/provoke-crashes.txt
+config CPU_NOTIFIER_ERROR_INJECT
+ tristate "CPU notifier error injection module"
+ depends on HOTPLUG_CPU && DEBUG_KERNEL
+ help
+ This option provides a kernel module that can be used to test
+ the error handling of the cpu notifiers
+
+ To compile this code as a module, choose M here: the module will
+ be called cpu-notifier-error-inject.
+
+ If unsure, say N.
+
config FAULT_INJECTION
bool "Fault-injection framework"
depends on DEBUG_KERNEL
@@ -1039,10 +1051,10 @@ config DYNAMIC_DEBUG
Usage:
- Dynamic debugging is controlled via the 'dynamic_debug/ddebug' file,
+ Dynamic debugging is controlled via the 'dynamic_debug/control' file,
which is contained in the 'debugfs' filesystem. Thus, the debugfs
filesystem must first be mounted before making use of this feature.
- We refer the control file as: <debugfs>/dynamic_debug/ddebug. This
+ We refer the control file as: <debugfs>/dynamic_debug/control. This
file contains a list of the debug statements that can be enabled. The
format for each line of the file is:
@@ -1057,7 +1069,7 @@ config DYNAMIC_DEBUG
From a live system:
- nullarbor:~ # cat <debugfs>/dynamic_debug/ddebug
+ nullarbor:~ # cat <debugfs>/dynamic_debug/control
# filename:lineno [module]function flags format
fs/aio.c:222 [aio]__put_ioctx - "__put_ioctx:\040freeing\040%p\012"
fs/aio.c:248 [aio]ioctx_alloc - "ENOMEM:\040nr_events\040too\040high\012"
@@ -1067,23 +1079,23 @@ config DYNAMIC_DEBUG
// enable the message at line 1603 of file svcsock.c
nullarbor:~ # echo -n 'file svcsock.c line 1603 +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// enable all the messages in file svcsock.c
nullarbor:~ # echo -n 'file svcsock.c +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// enable all the messages in the NFS server module
nullarbor:~ # echo -n 'module nfsd +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// enable all 12 messages in the function svc_process()
nullarbor:~ # echo -n 'func svc_process +p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
// disable all 12 messages in the function svc_process()
nullarbor:~ # echo -n 'func svc_process -p' >
- <debugfs>/dynamic_debug/ddebug
+ <debugfs>/dynamic_debug/control
See Documentation/dynamic-debug-howto.txt for additional information.
diff --git a/lib/Makefile b/lib/Makefile
index 9e6d3c29d73..3f1062cbbff 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -21,7 +21,7 @@ lib-y += kobject.o kref.o klist.o
obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
- string_helpers.o gcd.o lcm.o list_sort.o
+ string_helpers.o gcd.o lcm.o list_sort.o uuid.o
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG
@@ -85,6 +85,7 @@ obj-$(CONFIG_AUDIT_GENERIC) += audit.o
obj-$(CONFIG_SWIOTLB) += swiotlb.o
obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
+obj-$(CONFIG_CPU_NOTIFIER_ERROR_INJECT) += cpu-notifier-error-inject.o
lib-$(CONFIG_GENERIC_BUG) += bug.o
diff --git a/lib/atomic64_test.c b/lib/atomic64_test.c
index 65e482caf5e..250ed11d3ed 100644
--- a/lib/atomic64_test.c
+++ b/lib/atomic64_test.c
@@ -9,6 +9,7 @@
* (at your option) any later version.
*/
#include <linux/init.h>
+#include <linux/kernel.h>
#include <asm/atomic.h>
#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
@@ -112,7 +113,8 @@ static __init int test_atomic64(void)
r += one;
BUG_ON(v.counter != r);
-#if defined(CONFIG_X86) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(_ASM_GENERIC_ATOMIC64_H)
+#if defined(CONFIG_X86) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || \
+ defined(CONFIG_S390) || defined(_ASM_GENERIC_ATOMIC64_H)
INIT(onestwos);
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
r -= one;
diff --git a/lib/bug.c b/lib/bug.c
index 300e41afbf9..f13daf43521 100644
--- a/lib/bug.c
+++ b/lib/bug.c
@@ -165,7 +165,7 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
(void *)bugaddr);
show_regs(regs);
- add_taint(TAINT_WARN);
+ add_taint(BUG_GET_TAINT(bug));
return BUG_TRAP_TYPE_WARN;
}
diff --git a/lib/cpu-notifier-error-inject.c b/lib/cpu-notifier-error-inject.c
new file mode 100644
index 00000000000..4dc20321b0d
--- /dev/null
+++ b/lib/cpu-notifier-error-inject.c
@@ -0,0 +1,63 @@
+#include <linux/kernel.h>
+#include <linux/cpu.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+
+static int priority;
+static int cpu_up_prepare_error;
+static int cpu_down_prepare_error;
+
+module_param(priority, int, 0);
+MODULE_PARM_DESC(priority, "specify cpu notifier priority");
+
+module_param(cpu_up_prepare_error, int, 0644);
+MODULE_PARM_DESC(cpu_up_prepare_error,
+ "specify error code to inject CPU_UP_PREPARE action");
+
+module_param(cpu_down_prepare_error, int, 0644);
+MODULE_PARM_DESC(cpu_down_prepare_error,
+ "specify error code to inject CPU_DOWN_PREPARE action");
+
+static int err_inject_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ int err = 0;
+
+ switch (action) {
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
+ err = cpu_up_prepare_error;
+ break;
+ case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
+ err = cpu_down_prepare_error;
+ break;
+ }
+ if (err)
+ printk(KERN_INFO "Injecting error (%d) at cpu notifier\n", err);
+
+ return notifier_from_errno(err);
+}
+
+static struct notifier_block err_inject_cpu_notifier = {
+ .notifier_call = err_inject_cpu_callback,
+};
+
+static int err_inject_init(void)
+{
+ err_inject_cpu_notifier.priority = priority;
+
+ return register_hotcpu_notifier(&err_inject_cpu_notifier);
+}
+
+static void err_inject_exit(void)
+{
+ unregister_hotcpu_notifier(&err_inject_cpu_notifier);
+}
+
+module_init(err_inject_init);
+module_exit(err_inject_exit);
+
+MODULE_DESCRIPTION("CPU notifier error injection module");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
diff --git a/lib/crc32.c b/lib/crc32.c
index bc5b936e914..4855995fcde 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -48,12 +48,20 @@ MODULE_LICENSE("GPL");
#if CRC_LE_BITS == 8 || CRC_BE_BITS == 8
static inline u32
-crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 *tab)
+crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
{
# ifdef __LITTLE_ENDIAN
-# define DO_CRC(x) crc = tab[(crc ^ (x)) & 255 ] ^ (crc >> 8)
+# define DO_CRC(x) crc = tab[0][(crc ^ (x)) & 255] ^ (crc >> 8)
+# define DO_CRC4 crc = tab[3][(crc) & 255] ^ \
+ tab[2][(crc >> 8) & 255] ^ \
+ tab[1][(crc >> 16) & 255] ^ \
+ tab[0][(crc >> 24) & 255]
# else
-# define DO_CRC(x) crc = tab[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
+# define DO_CRC(x) crc = tab[0][((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
+# define DO_CRC4 crc = tab[0][(crc) & 255] ^ \
+ tab[1][(crc >> 8) & 255] ^ \
+ tab[2][(crc >> 16) & 255] ^ \
+ tab[3][(crc >> 24) & 255]
# endif
const u32 *b;
size_t rem_len;
@@ -70,10 +78,7 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 *tab)
b = (const u32 *)buf;
for (--b; len; --len) {
crc ^= *++b; /* use pre increment for speed */
- DO_CRC(0);
- DO_CRC(0);
- DO_CRC(0);
- DO_CRC(0);
+ DO_CRC4;
}
len = rem_len;
/* And the last few bytes */
@@ -85,6 +90,7 @@ crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 *tab)
}
return crc;
#undef DO_CRC
+#undef DO_CRC4
}
#endif
/**
@@ -117,7 +123,7 @@ u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
{
# if CRC_LE_BITS == 8
- const u32 *tab = crc32table_le;
+ const u32 (*tab)[] = crc32table_le;
crc = __cpu_to_le32(crc);
crc = crc32_body(crc, p, len, tab);
@@ -174,7 +180,7 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
{
# if CRC_BE_BITS == 8
- const u32 *tab = crc32table_be;
+ const u32 (*tab)[] = crc32table_be;
crc = __cpu_to_be32(crc);
crc = crc32_body(crc, p, len, tab);
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index d6b8b9b1abf..3df8eb17a60 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -456,7 +456,7 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
__func__, (int)len);
nwords = ddebug_tokenize(tmpbuf, words, MAXWORDS);
- if (nwords < 0)
+ if (nwords <= 0)
return -EINVAL;
if (ddebug_parse_query(words, nwords-1, &query))
return -EINVAL;
diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c
index bea5d97df99..85d0e412a04 100644
--- a/lib/gen_crc32table.c
+++ b/lib/gen_crc32table.c
@@ -7,8 +7,8 @@
#define LE_TABLE_SIZE (1 << CRC_LE_BITS)
#define BE_TABLE_SIZE (1 << CRC_BE_BITS)
-static uint32_t crc32table_le[LE_TABLE_SIZE];
-static uint32_t crc32table_be[BE_TABLE_SIZE];
+static uint32_t crc32table_le[4][LE_TABLE_SIZE];
+static uint32_t crc32table_be[4][BE_TABLE_SIZE];
/**
* crc32init_le() - allocate and initialize LE table data
@@ -22,12 +22,19 @@ static void crc32init_le(void)
unsigned i, j;
uint32_t crc = 1;
- crc32table_le[0] = 0;
+ crc32table_le[0][0] = 0;
for (i = 1 << (CRC_LE_BITS - 1); i; i >>= 1) {
crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
for (j = 0; j < LE_TABLE_SIZE; j += 2 * i)
- crc32table_le[i + j] = crc ^ crc32table_le[j];
+ crc32table_le[0][i + j] = crc ^ crc32table_le[0][j];
+ }
+ for (i = 0; i < LE_TABLE_SIZE; i++) {
+ crc = crc32table_le[0][i];
+ for (j = 1; j < 4; j++) {
+ crc = crc32table_le[0][crc & 0xff] ^ (crc >> 8);
+ crc32table_le[j][i] = crc;
+ }
}
}
@@ -39,25 +46,35 @@ static void crc32init_be(void)
unsigned i, j;
uint32_t crc = 0x80000000;
- crc32table_be[0] = 0;
+ crc32table_be[0][0] = 0;
for (i = 1; i < BE_TABLE_SIZE; i <<= 1) {
crc = (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0);
for (j = 0; j < i; j++)
- crc32table_be[i + j] = crc ^ crc32table_be[j];
+ crc32table_be[0][i + j] = crc ^ crc32table_be[0][j];
+ }
+ for (i = 0; i < BE_TABLE_SIZE; i++) {
+ crc = crc32table_be[0][i];
+ for (j = 1; j < 4; j++) {
+ crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8);
+ crc32table_be[j][i] = crc;
+ }
}
}
-static void output_table(uint32_t table[], int len, char *trans)
+static void output_table(uint32_t table[4][256], int len, char *trans)
{
- int i;
+ int i, j;
- for (i = 0; i < len - 1; i++) {
- if (i % ENTRIES_PER_LINE == 0)
- printf("\n");
- printf("%s(0x%8.8xL), ", trans, table[i]);
+ for (j = 0 ; j < 4; j++) {
+ printf("{");
+ for (i = 0; i < len - 1; i++) {
+ if (i % ENTRIES_PER_LINE == 0)
+ printf("\n");
+ printf("%s(0x%8.8xL), ", trans, table[j][i]);
+ }
+ printf("%s(0x%8.8xL)},\n", trans, table[j][len - 1]);
}
- printf("%s(0x%8.8xL)\n", trans, table[len - 1]);
}
int main(int argc, char** argv)
@@ -66,14 +83,14 @@ int main(int argc, char** argv)
if (CRC_LE_BITS > 1) {
crc32init_le();
- printf("static const u32 crc32table_le[] = {");
+ printf("static const u32 crc32table_le[4][256] = {");
output_table(crc32table_le, LE_TABLE_SIZE, "tole");
printf("};\n");
}
if (CRC_BE_BITS > 1) {
crc32init_be();
- printf("static const u32 crc32table_be[] = {");
+ printf("static const u32 crc32table_be[4][256] = {");
output_table(crc32table_be, BE_TABLE_SIZE, "tobe");
printf("};\n");
}
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 39af2560f76..5d7a4802c56 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -16,6 +16,24 @@ const char hex_asc[] = "0123456789abcdef";
EXPORT_SYMBOL(hex_asc);
/**
+ * hex_to_bin - convert a hex digit to its real value
+ * @ch: ascii character represents hex digit
+ *
+ * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad
+ * input.
+ */
+int hex_to_bin(char ch)
+{
+ if ((ch >= '0') && (ch <= '9'))
+ return ch - '0';
+ ch = tolower(ch);
+ if ((ch >= 'a') && (ch <= 'f'))
+ return ch - 'a' + 10;
+ return -1;
+}
+EXPORT_SYMBOL(hex_to_bin);
+
+/**
* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
* @buf: data blob to dump
* @len: number of bytes in the @buf
@@ -34,7 +52,7 @@ EXPORT_SYMBOL(hex_asc);
*
* E.g.:
* hex_dump_to_buffer(frame->data, frame->len, 16, 1,
- * linebuf, sizeof(linebuf), 1);
+ * linebuf, sizeof(linebuf), true);
*
* example output buffer:
* 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
@@ -65,8 +83,8 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%s%16.16llx", j ? " " : "",
- (unsigned long long)*(ptr8 + j));
+ "%s%16.16llx", j ? " " : "",
+ (unsigned long long)*(ptr8 + j));
ascii_column = 17 * ngroups + 2;
break;
}
@@ -77,7 +95,7 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%s%8.8x", j ? " " : "", *(ptr4 + j));
+ "%s%8.8x", j ? " " : "", *(ptr4 + j));
ascii_column = 9 * ngroups + 2;
break;
}
@@ -88,7 +106,7 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%s%4.4x", j ? " " : "", *(ptr2 + j));
+ "%s%4.4x", j ? " " : "", *(ptr2 + j));
ascii_column = 5 * ngroups + 2;
break;
}
@@ -111,9 +129,10 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
while (lx < (linebuflen - 1) && lx < (ascii_column - 1))
linebuf[lx++] = ' ';
- for (j = 0; (j < len) && (lx + 2) < linebuflen; j++)
- linebuf[lx++] = (isascii(ptr[j]) && isprint(ptr[j])) ? ptr[j]
- : '.';
+ for (j = 0; (j < len) && (lx + 2) < linebuflen; j++) {
+ ch = ptr[j];
+ linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
+ }
nil:
linebuf[lx++] = '\0';
}
@@ -143,7 +162,7 @@ EXPORT_SYMBOL(hex_dump_to_buffer);
*
* E.g.:
* print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS,
- * 16, 1, frame->data, frame->len, 1);
+ * 16, 1, frame->data, frame->len, true);
*
* Example output using %DUMP_PREFIX_OFFSET and 1-byte mode:
* 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO
@@ -151,12 +170,12 @@ EXPORT_SYMBOL(hex_dump_to_buffer);
* ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~.
*/
void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
- int rowsize, int groupsize,
- const void *buf, size_t len, bool ascii)
+ int rowsize, int groupsize,
+ const void *buf, size_t len, bool ascii)
{
const u8 *ptr = buf;
int i, linelen, remaining = len;
- unsigned char linebuf[200];
+ unsigned char linebuf[32 * 3 + 2 + 32 + 1];
if (rowsize != 16 && rowsize != 32)
rowsize = 16;
@@ -164,13 +183,14 @@ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
for (i = 0; i < len; i += rowsize) {
linelen = min(remaining, rowsize);
remaining -= rowsize;
+
hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
- linebuf, sizeof(linebuf), ascii);
+ linebuf, sizeof(linebuf), ascii);
switch (prefix_type) {
case DUMP_PREFIX_ADDRESS:
- printk("%s%s%*p: %s\n", level, prefix_str,
- (int)(2 * sizeof(void *)), ptr + i, linebuf);
+ printk("%s%s%p: %s\n",
+ level, prefix_str, ptr + i, linebuf);
break;
case DUMP_PREFIX_OFFSET:
printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf);
@@ -196,9 +216,9 @@ EXPORT_SYMBOL(print_hex_dump);
* rowsize of 16, groupsize of 1, and ASCII output included.
*/
void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
- const void *buf, size_t len)
+ const void *buf, size_t len)
{
print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
- buf, len, 1);
+ buf, len, true);
}
EXPORT_SYMBOL(print_hex_dump_bytes);
diff --git a/lib/idr.c b/lib/idr.c
index 422a9d5069c..c1a20690176 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -445,6 +445,7 @@ EXPORT_SYMBOL(idr_remove);
void idr_remove_all(struct idr *idp)
{
int n, id, max;
+ int bt_mask;
struct idr_layer *p;
struct idr_layer *pa[MAX_LEVEL];
struct idr_layer **paa = &pa[0];
@@ -462,8 +463,10 @@ void idr_remove_all(struct idr *idp)
p = p->ary[(id >> n) & IDR_MASK];
}
+ bt_mask = id;
id += 1 << n;
- while (n < fls(id)) {
+ /* Get the highest bit that the above add changed from 0->1. */
+ while (n < fls(id ^ bt_mask)) {
if (p)
free_layer(p);
n += IDR_BITS;
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 59c15511d58..b93579504df 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -83,6 +83,7 @@ out:
return ret;
}
+#ifdef CONFIG_NET
static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
{
struct kobject *kobj = data;
@@ -98,6 +99,7 @@ static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
return 0;
}
+#endif
static int kobj_usermode_filter(struct kobject *kobj)
{
@@ -378,6 +380,7 @@ static int uevent_net_init(struct net *net)
if (!ue_sk->sk) {
printk(KERN_ERR
"kobject_uevent: unable to create netlink socket!\n");
+ kfree(ue_sk);
return -ENODEV;
}
mutex_lock(&uevent_sock_mutex);
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 2a087e0f986..05da38bcc29 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -656,7 +656,7 @@ EXPORT_SYMBOL(radix_tree_next_hole);
*
* Returns: the index of the hole if found, otherwise returns an index
* outside of the set specified (in which case 'index - return >= max_scan'
- * will be true). In rare cases of wrap-around, LONG_MAX will be returned.
+ * will be true). In rare cases of wrap-around, ULONG_MAX will be returned.
*
* radix_tree_next_hole may be called under rcu_read_lock. However, like
* radix_tree_gang_lookup, this will not atomically search a snapshot of
@@ -674,7 +674,7 @@ unsigned long radix_tree_prev_hole(struct radix_tree_root *root,
if (!radix_tree_lookup(root, index))
break;
index--;
- if (index == LONG_MAX)
+ if (index == ULONG_MAX)
break;
}
diff --git a/lib/random32.c b/lib/random32.c
index 556d5ffe110..fc3545a3277 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -39,13 +39,16 @@
#include <linux/jiffies.h>
#include <linux/random.h>
-struct rnd_state {
- u32 s1, s2, s3;
-};
-
static DEFINE_PER_CPU(struct rnd_state, net_rand_state);
-static u32 __random32(struct rnd_state *state)
+/**
+ * prandom32 - seeded pseudo-random number generator.
+ * @state: pointer to state structure holding seeded state.
+ *
+ * This is used for pseudo-randomness with no outside seeding.
+ * For more random results, use random32().
+ */
+u32 prandom32(struct rnd_state *state)
{
#define TAUSWORTHE(s,a,b,c,d) ((s&c)<<d) ^ (((s <<a) ^ s)>>b)
@@ -55,14 +58,7 @@ static u32 __random32(struct rnd_state *state)
return (state->s1 ^ state->s2 ^ state->s3);
}
-
-/*
- * Handle minimum values for seeds
- */
-static inline u32 __seed(u32 x, u32 m)
-{
- return (x < m) ? x + m : x;
-}
+EXPORT_SYMBOL(prandom32);
/**
* random32 - pseudo random number generator
@@ -75,7 +71,7 @@ u32 random32(void)
{
unsigned long r;
struct rnd_state *state = &get_cpu_var(net_rand_state);
- r = __random32(state);
+ r = prandom32(state);
put_cpu_var(state);
return r;
}
@@ -118,12 +114,12 @@ static int __init random32_init(void)
state->s3 = __seed(LCG(state->s2), 15);
/* "warm it up" */
- __random32(state);
- __random32(state);
- __random32(state);
- __random32(state);
- __random32(state);
- __random32(state);
+ prandom32(state);
+ prandom32(state);
+ prandom32(state);
+ prandom32(state);
+ prandom32(state);
+ prandom32(state);
}
return 0;
}
@@ -147,7 +143,7 @@ static int __init random32_reseed(void)
state->s3 = __seed(seeds[2], 15);
/* mix it in */
- __random32(state);
+ prandom32(state);
}
return 0;
}
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 5fddf720da7..a009055140e 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -757,37 +757,6 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
EXPORT_SYMBOL(swiotlb_sync_single_for_device);
/*
- * Same as above, but for a sub-range of the mapping.
- */
-static void
-swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
- unsigned long offset, size_t size,
- int dir, int target)
-{
- swiotlb_sync_single(hwdev, dev_addr + offset, size, dir, target);
-}
-
-void
-swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
- unsigned long offset, size_t size,
- enum dma_data_direction dir)
-{
- swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
- SYNC_FOR_CPU);
-}
-EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_cpu);
-
-void
-swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
- unsigned long offset, size_t size,
- enum dma_data_direction dir)
-{
- swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
- SYNC_FOR_DEVICE);
-}
-EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
-
-/*
* Map a set of buffers described by scatterlist in streaming mode for DMA.
* This is the scatter-gather version of the above swiotlb_map_page
* interface. Here the scatter gather list elements are each tagged with the
diff --git a/lib/uuid.c b/lib/uuid.c
new file mode 100644
index 00000000000..8fadd7cef46
--- /dev/null
+++ b/lib/uuid.c
@@ -0,0 +1,53 @@
+/*
+ * Unified UUID/GUID definition
+ *
+ * Copyright (C) 2009, Intel Corp.
+ * Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/uuid.h>
+#include <linux/random.h>
+
+static void __uuid_gen_common(__u8 b[16])
+{
+ int i;
+ u32 r;
+
+ for (i = 0; i < 4; i++) {
+ r = random32();
+ memcpy(b + i * 4, &r, 4);
+ }
+ /* reversion 0b10 */
+ b[8] = (b[8] & 0x3F) | 0x80;
+}
+
+void uuid_le_gen(uuid_le *lu)
+{
+ __uuid_gen_common(lu->b);
+ /* version 4 : random generation */
+ lu->b[7] = (lu->b[7] & 0x0F) | 0x40;
+}
+EXPORT_SYMBOL_GPL(uuid_le_gen);
+
+void uuid_be_gen(uuid_be *bu)
+{
+ __uuid_gen_common(bu->b);
+ /* version 4 : random generation */
+ bu->b[6] = (bu->b[6] & 0x0F) | 0x40;
+}
+EXPORT_SYMBOL_GPL(uuid_be_gen);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 46d34b0b74a..b8a2f549ab0 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -267,7 +267,8 @@ int strict_strtoll(const char *cp, unsigned int base, long long *res)
}
EXPORT_SYMBOL(strict_strtoll);
-static int skip_atoi(const char **s)
+static noinline_for_stack
+int skip_atoi(const char **s)
{
int i = 0;
@@ -287,7 +288,8 @@ static int skip_atoi(const char **s)
/* Formats correctly any integer in [0,99999].
* Outputs from one to five digits depending on input.
* On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
-static char *put_dec_trunc(char *buf, unsigned q)
+static noinline_for_stack
+char *put_dec_trunc(char *buf, unsigned q)
{
unsigned d3, d2, d1, d0;
d1 = (q>>4) & 0xf;
@@ -324,7 +326,8 @@ static char *put_dec_trunc(char *buf, unsigned q)
return buf;
}
/* Same with if's removed. Always emits five digits */
-static char *put_dec_full(char *buf, unsigned q)
+static noinline_for_stack
+char *put_dec_full(char *buf, unsigned q)
{
/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
/* but anyway, gcc produces better code with full-sized ints */
@@ -366,7 +369,8 @@ static char *put_dec_full(char *buf, unsigned q)
return buf;
}
/* No inlining helps gcc to use registers better */
-static noinline char *put_dec(char *buf, unsigned long long num)
+static noinline_for_stack
+char *put_dec(char *buf, unsigned long long num)
{
while (1) {
unsigned rem;
@@ -417,8 +421,9 @@ struct printf_spec {
s16 precision; /* # of digits/chars */
};
-static char *number(char *buf, char *end, unsigned long long num,
- struct printf_spec spec)
+static noinline_for_stack
+char *number(char *buf, char *end, unsigned long long num,
+ struct printf_spec spec)
{
/* we are called with base 8, 10 or 16, only, thus don't need "G..." */
static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
@@ -537,7 +542,8 @@ static char *number(char *buf, char *end, unsigned long long num,
return buf;
}
-static char *string(char *buf, char *end, const char *s, struct printf_spec spec)
+static noinline_for_stack
+char *string(char *buf, char *end, const char *s, struct printf_spec spec)
{
int len, i;
@@ -567,8 +573,9 @@ static char *string(char *buf, char *end, const char *s, struct printf_spec spec
return buf;
}
-static char *symbol_string(char *buf, char *end, void *ptr,
- struct printf_spec spec, char ext)
+static noinline_for_stack
+char *symbol_string(char *buf, char *end, void *ptr,
+ struct printf_spec spec, char ext)
{
unsigned long value = (unsigned long) ptr;
#ifdef CONFIG_KALLSYMS
@@ -588,8 +595,9 @@ static char *symbol_string(char *buf, char *end, void *ptr,
#endif
}
-static char *resource_string(char *buf, char *end, struct resource *res,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *resource_string(char *buf, char *end, struct resource *res,
+ struct printf_spec spec, const char *fmt)
{
#ifndef IO_RSRC_PRINTK_SIZE
#define IO_RSRC_PRINTK_SIZE 6
@@ -690,8 +698,9 @@ static char *resource_string(char *buf, char *end, struct resource *res,
return string(buf, end, sym, spec);
}
-static char *mac_address_string(char *buf, char *end, u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *mac_address_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")];
char *p = mac_addr;
@@ -714,7 +723,8 @@ static char *mac_address_string(char *buf, char *end, u8 *addr,
return string(buf, end, mac_addr, spec);
}
-static char *ip4_string(char *p, const u8 *addr, const char *fmt)
+static noinline_for_stack
+char *ip4_string(char *p, const u8 *addr, const char *fmt)
{
int i;
bool leading_zeros = (fmt[0] == 'i');
@@ -763,7 +773,8 @@ static char *ip4_string(char *p, const u8 *addr, const char *fmt)
return p;
}
-static char *ip6_compressed_string(char *p, const char *addr)
+static noinline_for_stack
+char *ip6_compressed_string(char *p, const char *addr)
{
int i, j, range;
unsigned char zerolength[8];
@@ -843,7 +854,8 @@ static char *ip6_compressed_string(char *p, const char *addr)
return p;
}
-static char *ip6_string(char *p, const char *addr, const char *fmt)
+static noinline_for_stack
+char *ip6_string(char *p, const char *addr, const char *fmt)
{
int i;
@@ -858,8 +870,9 @@ static char *ip6_string(char *p, const char *addr, const char *fmt)
return p;
}
-static char *ip6_addr_string(char *buf, char *end, const u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *ip6_addr_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
@@ -871,8 +884,9 @@ static char *ip6_addr_string(char *buf, char *end, const u8 *addr,
return string(buf, end, ip6_addr, spec);
}
-static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *ip4_addr_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char ip4_addr[sizeof("255.255.255.255")];
@@ -881,8 +895,9 @@ static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
return string(buf, end, ip4_addr, spec);
}
-static char *uuid_string(char *buf, char *end, const u8 *addr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *uuid_string(char *buf, char *end, const u8 *addr,
+ struct printf_spec spec, const char *fmt)
{
char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
char *p = uuid;
@@ -970,8 +985,9 @@ static char *uuid_string(char *buf, char *end, const u8 *addr,
* function pointers are really function descriptors, which contain a
* pointer to the real address.
*/
-static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
- struct printf_spec spec)
+static noinline_for_stack
+char *pointer(const char *fmt, char *buf, char *end, void *ptr,
+ struct printf_spec spec)
{
if (!ptr)
return string(buf, end, "(null)", spec);
@@ -1040,7 +1056,8 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
* @precision: precision of a number
* @qualifier: qualifier of a number (long, size_t, ...)
*/
-static int format_decode(const char *fmt, struct printf_spec *spec)
+static noinline_for_stack
+int format_decode(const char *fmt, struct printf_spec *spec)
{
const char *start = fmt;
@@ -1980,7 +1997,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
{
char *s = (char *)va_arg(args, char *);
if (field_width == -1)
- field_width = SHORT_MAX;
+ field_width = SHRT_MAX;
/* first, skip leading white space in buffer */
str = skip_spaces(str);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 11:53:14 +0000