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-rw-r--r--lib/Kconfig2
-rw-r--r--lib/Kconfig.debug5
-rw-r--r--lib/Kconfig.kgdb3
-rw-r--r--lib/bug.c3
-rw-r--r--lib/devres.c58
-rw-r--r--lib/digsig.c41
-rw-r--r--lib/dynamic_debug.c165
-rw-r--r--lib/hexdump.c4
-rw-r--r--lib/locking-selftest.c34
-rw-r--r--lib/mpi/mpi-internal.h4
-rw-r--r--lib/mpi/mpicoder.c8
-rw-r--r--lib/parser.c6
-rw-r--r--lib/rwsem-spinlock.c69
-rw-r--r--lib/rwsem.c75
-rw-r--r--lib/swiotlb.c47
-rw-r--r--lib/vsprintf.c7
-rw-r--r--lib/xz/Kconfig34
17 files changed, 312 insertions, 253 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 75cdb77fa49..3958dc4389f 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -322,7 +322,7 @@ config CPUMASK_OFFSTACK
config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
- depends on EXPERIMENTAL && BROKEN
+ depends on BROKEN
config CPU_RMAP
bool
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a1714c897e3..e4a7f808fa0 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -243,8 +243,7 @@ config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE
default 1 if BOOTPARAM_SOFTLOCKUP_PANIC
config PANIC_ON_OOPS
- bool "Panic on Oops" if EXPERT
- default n
+ bool "Panic on Oops"
help
Say Y here to enable the kernel to panic when it oopses. This
has the same effect as setting oops=panic on the kernel command
@@ -455,7 +454,7 @@ config HAVE_DEBUG_KMEMLEAK
config DEBUG_KMEMLEAK
bool "Kernel memory leak detector"
- depends on DEBUG_KERNEL && EXPERIMENTAL && HAVE_DEBUG_KMEMLEAK
+ depends on DEBUG_KERNEL && HAVE_DEBUG_KMEMLEAK
select DEBUG_FS
select STACKTRACE if STACKTRACE_SUPPORT
select KALLSYMS
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb
index 43cb93fa265..dbb58ae1b8e 100644
--- a/lib/Kconfig.kgdb
+++ b/lib/Kconfig.kgdb
@@ -5,7 +5,7 @@ config HAVE_ARCH_KGDB
menuconfig KGDB
bool "KGDB: kernel debugger"
depends on HAVE_ARCH_KGDB
- depends on DEBUG_KERNEL && EXPERIMENTAL
+ depends on DEBUG_KERNEL
help
If you say Y here, it will be possible to remotely debug the
kernel using gdb. It is recommended but not required, that
@@ -22,6 +22,7 @@ config KGDB_SERIAL_CONSOLE
tristate "KGDB: use kgdb over the serial console"
select CONSOLE_POLL
select MAGIC_SYSRQ
+ depends on TTY
default y
help
Share a serial console with kgdb. Sysrq-g must be used
diff --git a/lib/bug.c b/lib/bug.c
index d0cdf14c651..168603477f0 100644
--- a/lib/bug.c
+++ b/lib/bug.c
@@ -166,7 +166,8 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
print_modules();
show_regs(regs);
print_oops_end_marker();
- add_taint(BUG_GET_TAINT(bug));
+ /* Just a warning, don't kill lockdep. */
+ add_taint(BUG_GET_TAINT(bug), LOCKDEP_STILL_OK);
return BUG_TRAP_TYPE_WARN;
}
diff --git a/lib/devres.c b/lib/devres.c
index 80b9c76d436..88ad75952a7 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -1,3 +1,4 @@
+#include <linux/err.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/gfp.h>
@@ -86,22 +87,24 @@ void devm_iounmap(struct device *dev, void __iomem *addr)
EXPORT_SYMBOL(devm_iounmap);
/**
- * devm_request_and_ioremap() - Check, request region, and ioremap resource
- * @dev: Generic device to handle the resource for
+ * devm_ioremap_resource() - check, request region, and ioremap resource
+ * @dev: generic device to handle the resource for
* @res: resource to be handled
*
- * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
- * everything is undone on driver detach. Checks arguments, so you can feed
- * it the result from e.g. platform_get_resource() directly. Returns the
- * remapped pointer or NULL on error. Usage example:
+ * Checks that a resource is a valid memory region, requests the memory region
+ * and ioremaps it either as cacheable or as non-cacheable memory depending on
+ * the resource's flags. All operations are managed and will be undone on
+ * driver detach.
+ *
+ * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure. Usage example:
*
* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- * base = devm_request_and_ioremap(&pdev->dev, res);
- * if (!base)
- * return -EADDRNOTAVAIL;
+ * base = devm_ioremap_resource(&pdev->dev, res);
+ * if (IS_ERR(base))
+ * return PTR_ERR(base);
*/
-void __iomem *devm_request_and_ioremap(struct device *dev,
- struct resource *res)
+void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
{
resource_size_t size;
const char *name;
@@ -111,7 +114,7 @@ void __iomem *devm_request_and_ioremap(struct device *dev,
if (!res || resource_type(res) != IORESOURCE_MEM) {
dev_err(dev, "invalid resource\n");
- return NULL;
+ return ERR_PTR(-EINVAL);
}
size = resource_size(res);
@@ -119,7 +122,7 @@ void __iomem *devm_request_and_ioremap(struct device *dev,
if (!devm_request_mem_region(dev, res->start, size, name)) {
dev_err(dev, "can't request region for resource %pR\n", res);
- return NULL;
+ return ERR_PTR(-EBUSY);
}
if (res->flags & IORESOURCE_CACHEABLE)
@@ -130,10 +133,39 @@ void __iomem *devm_request_and_ioremap(struct device *dev,
if (!dest_ptr) {
dev_err(dev, "ioremap failed for resource %pR\n", res);
devm_release_mem_region(dev, res->start, size);
+ dest_ptr = ERR_PTR(-ENOMEM);
}
return dest_ptr;
}
+EXPORT_SYMBOL(devm_ioremap_resource);
+
+/**
+ * devm_request_and_ioremap() - Check, request region, and ioremap resource
+ * @dev: Generic device to handle the resource for
+ * @res: resource to be handled
+ *
+ * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
+ * everything is undone on driver detach. Checks arguments, so you can feed
+ * it the result from e.g. platform_get_resource() directly. Returns the
+ * remapped pointer or NULL on error. Usage example:
+ *
+ * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ * base = devm_request_and_ioremap(&pdev->dev, res);
+ * if (!base)
+ * return -EADDRNOTAVAIL;
+ */
+void __iomem *devm_request_and_ioremap(struct device *device,
+ struct resource *res)
+{
+ void __iomem *dest_ptr;
+
+ dest_ptr = devm_ioremap_resource(device, res);
+ if (IS_ERR(dest_ptr))
+ return NULL;
+
+ return dest_ptr;
+}
EXPORT_SYMBOL(devm_request_and_ioremap);
#ifdef CONFIG_HAS_IOPORT
diff --git a/lib/digsig.c b/lib/digsig.c
index dc2be7ed176..2f31e6a45f0 100644
--- a/lib/digsig.c
+++ b/lib/digsig.c
@@ -30,11 +30,10 @@
static struct crypto_shash *shash;
-static int pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
- unsigned long msglen,
- unsigned long modulus_bitlen,
- unsigned char *out,
- unsigned long *outlen)
+static const char *pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
+ unsigned long msglen,
+ unsigned long modulus_bitlen,
+ unsigned long *outlen)
{
unsigned long modulus_len, ps_len, i;
@@ -42,11 +41,11 @@ static int pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
/* test message size */
if ((msglen > modulus_len) || (modulus_len < 11))
- return -EINVAL;
+ return NULL;
/* separate encoded message */
- if ((msg[0] != 0x00) || (msg[1] != (unsigned char)1))
- return -EINVAL;
+ if (msg[0] != 0x00 || msg[1] != 0x01)
+ return NULL;
for (i = 2; i < modulus_len - 1; i++)
if (msg[i] != 0xFF)
@@ -56,19 +55,13 @@ static int pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
if (msg[i] != 0)
/* There was no octet with hexadecimal value 0x00
to separate ps from m. */
- return -EINVAL;
+ return NULL;
ps_len = i - 2;
- if (*outlen < (msglen - (2 + ps_len + 1))) {
- *outlen = msglen - (2 + ps_len + 1);
- return -EOVERFLOW;
- }
-
*outlen = (msglen - (2 + ps_len + 1));
- memcpy(out, &msg[2 + ps_len + 1], *outlen);
- return 0;
+ return msg + 2 + ps_len + 1;
}
/*
@@ -83,7 +76,8 @@ static int digsig_verify_rsa(struct key *key,
unsigned long mlen, mblen;
unsigned nret, l;
int head, i;
- unsigned char *out1 = NULL, *out2 = NULL;
+ unsigned char *out1 = NULL;
+ const char *m;
MPI in = NULL, res = NULL, pkey[2];
uint8_t *p, *datap, *endp;
struct user_key_payload *ukp;
@@ -120,7 +114,7 @@ static int digsig_verify_rsa(struct key *key,
}
mblen = mpi_get_nbits(pkey[0]);
- mlen = (mblen + 7)/8;
+ mlen = DIV_ROUND_UP(mblen, 8);
if (mlen == 0)
goto err;
@@ -129,10 +123,6 @@ static int digsig_verify_rsa(struct key *key,
if (!out1)
goto err;
- out2 = kzalloc(mlen, GFP_KERNEL);
- if (!out2)
- goto err;
-
nret = siglen;
in = mpi_read_from_buffer(sig, &nret);
if (!in)
@@ -164,18 +154,15 @@ static int digsig_verify_rsa(struct key *key,
kfree(p);
- err = pkcs_1_v1_5_decode_emsa(out1, len, mblen, out2, &len);
- if (err)
- goto err;
+ m = pkcs_1_v1_5_decode_emsa(out1, len, mblen, &len);
- if (len != hlen || memcmp(out2, h, hlen))
+ if (!m || len != hlen || memcmp(m, h, hlen))
err = -EINVAL;
err:
mpi_free(in);
mpi_free(res);
kfree(out1);
- kfree(out2);
while (--i >= 0)
mpi_free(pkey[i]);
err1:
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 1db1fc66053..5276b99ca65 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -59,7 +59,7 @@ struct ddebug_iter {
static DEFINE_MUTEX(ddebug_lock);
static LIST_HEAD(ddebug_tables);
-static int verbose = 0;
+static int verbose;
module_param(verbose, int, 0644);
/* Return the path relative to source root */
@@ -100,24 +100,32 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
return buf;
}
-#define vpr_info(fmt, ...) \
- if (verbose) do { pr_info(fmt, ##__VA_ARGS__); } while (0)
-
-#define vpr_info_dq(q, msg) \
+#define vpr_info(fmt, ...) \
do { \
- /* trim last char off format print */ \
- vpr_info("%s: func=\"%s\" file=\"%s\" " \
- "module=\"%s\" format=\"%.*s\" " \
- "lineno=%u-%u", \
- msg, \
- q->function ? q->function : "", \
- q->filename ? q->filename : "", \
- q->module ? q->module : "", \
- (int)(q->format ? strlen(q->format) - 1 : 0), \
- q->format ? q->format : "", \
- q->first_lineno, q->last_lineno); \
+ if (verbose) \
+ pr_info(fmt, ##__VA_ARGS__); \
} while (0)
+static void vpr_info_dq(const struct ddebug_query *query, const char *msg)
+{
+ /* trim any trailing newlines */
+ int fmtlen = 0;
+
+ if (query->format) {
+ fmtlen = strlen(query->format);
+ while (fmtlen && query->format[fmtlen - 1] == '\n')
+ fmtlen--;
+ }
+
+ vpr_info("%s: func=\"%s\" file=\"%s\" module=\"%s\" format=\"%.*s\" lineno=%u-%u\n",
+ msg,
+ query->function ? query->function : "",
+ query->filename ? query->filename : "",
+ query->module ? query->module : "",
+ fmtlen, query->format ? query->format : "",
+ query->first_lineno, query->last_lineno);
+}
+
/*
* Search the tables for _ddebug's which match the given `query' and
* apply the `flags' and `mask' to them. Returns number of matching
@@ -141,7 +149,7 @@ static int ddebug_change(const struct ddebug_query *query,
if (query->module && strcmp(query->module, dt->mod_name))
continue;
- for (i = 0 ; i < dt->num_ddebugs ; i++) {
+ for (i = 0; i < dt->num_ddebugs; i++) {
struct _ddebug *dp = &dt->ddebugs[i];
/* match against the source filename */
@@ -176,10 +184,10 @@ static int ddebug_change(const struct ddebug_query *query,
continue;
dp->flags = newflags;
vpr_info("changed %s:%d [%s]%s =%s\n",
- trim_prefix(dp->filename), dp->lineno,
- dt->mod_name, dp->function,
- ddebug_describe_flags(dp, flagbuf,
- sizeof(flagbuf)));
+ trim_prefix(dp->filename), dp->lineno,
+ dt->mod_name, dp->function,
+ ddebug_describe_flags(dp, flagbuf,
+ sizeof(flagbuf)));
}
}
mutex_unlock(&ddebug_lock);
@@ -213,19 +221,23 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
/* find `end' of word, whitespace separated or quoted */
if (*buf == '"' || *buf == '\'') {
int quote = *buf++;
- for (end = buf ; *end && *end != quote ; end++)
+ for (end = buf; *end && *end != quote; end++)
;
- if (!*end)
+ if (!*end) {
+ pr_err("unclosed quote: %s\n", buf);
return -EINVAL; /* unclosed quote */
+ }
} else {
- for (end = buf ; *end && !isspace(*end) ; end++)
+ for (end = buf; *end && !isspace(*end); end++)
;
BUG_ON(end == buf);
}
/* `buf' is start of word, `end' is one past its end */
- if (nwords == maxwords)
+ if (nwords == maxwords) {
+ pr_err("too many words, legal max <=%d\n", maxwords);
return -EINVAL; /* ran out of words[] before bytes */
+ }
if (*end)
*end++ = '\0'; /* terminate the word */
words[nwords++] = buf;
@@ -235,7 +247,7 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
if (verbose) {
int i;
pr_info("split into words:");
- for (i = 0 ; i < nwords ; i++)
+ for (i = 0; i < nwords; i++)
pr_cont(" \"%s\"", words[i]);
pr_cont("\n");
}
@@ -257,7 +269,11 @@ static inline int parse_lineno(const char *str, unsigned int *val)
return 0;
}
*val = simple_strtoul(str, &end, 10);
- return end == NULL || end == str || *end != '\0' ? -EINVAL : 0;
+ if (end == NULL || end == str || *end != '\0') {
+ pr_err("bad line-number: %s\n", str);
+ return -EINVAL;
+ }
+ return 0;
}
/*
@@ -286,11 +302,11 @@ static char *unescape(char *str)
in += 2;
continue;
} else if (isodigit(in[1]) &&
- isodigit(in[2]) &&
- isodigit(in[3])) {
- *out++ = ((in[1] - '0')<<6) |
- ((in[2] - '0')<<3) |
- (in[3] - '0');
+ isodigit(in[2]) &&
+ isodigit(in[3])) {
+ *out++ = (((in[1] - '0') << 6) |
+ ((in[2] - '0') << 3) |
+ (in[3] - '0'));
in += 4;
continue;
}
@@ -308,8 +324,8 @@ static int check_set(const char **dest, char *src, char *name)
if (*dest) {
rc = -EINVAL;
- pr_err("match-spec:%s val:%s overridden by %s",
- name, *dest, src);
+ pr_err("match-spec:%s val:%s overridden by %s\n",
+ name, *dest, src);
}
*dest = src;
return rc;
@@ -337,40 +353,46 @@ static int ddebug_parse_query(char *words[], int nwords,
int rc;
/* check we have an even number of words */
- if (nwords % 2 != 0)
+ if (nwords % 2 != 0) {
+ pr_err("expecting pairs of match-spec <value>\n");
return -EINVAL;
+ }
memset(query, 0, sizeof(*query));
if (modname)
/* support $modname.dyndbg=<multiple queries> */
query->module = modname;
- for (i = 0 ; i < nwords ; i += 2) {
- if (!strcmp(words[i], "func"))
+ for (i = 0; i < nwords; i += 2) {
+ if (!strcmp(words[i], "func")) {
rc = check_set(&query->function, words[i+1], "func");
- else if (!strcmp(words[i], "file"))
+ } else if (!strcmp(words[i], "file")) {
rc = check_set(&query->filename, words[i+1], "file");
- else if (!strcmp(words[i], "module"))
+ } else if (!strcmp(words[i], "module")) {
rc = check_set(&query->module, words[i+1], "module");
- else if (!strcmp(words[i], "format"))
+ } else if (!strcmp(words[i], "format")) {
rc = check_set(&query->format, unescape(words[i+1]),
- "format");
- else if (!strcmp(words[i], "line")) {
+ "format");
+ } else if (!strcmp(words[i], "line")) {
char *first = words[i+1];
char *last = strchr(first, '-');
if (query->first_lineno || query->last_lineno) {
- pr_err("match-spec:line given 2 times\n");
+ pr_err("match-spec: line used 2x\n");
return -EINVAL;
}
if (last)
*last++ = '\0';
- if (parse_lineno(first, &query->first_lineno) < 0)
+ if (parse_lineno(first, &query->first_lineno) < 0) {
+ pr_err("line-number is <0\n");
return -EINVAL;
+ }
if (last) {
/* range <first>-<last> */
if (parse_lineno(last, &query->last_lineno)
< query->first_lineno) {
- pr_err("last-line < 1st-line\n");
+ pr_err("last-line:%d < 1st-line:%d\n",
+ query->last_lineno,
+ query->first_lineno);
return -EINVAL;
}
} else {
@@ -406,19 +428,22 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
op = *str++;
break;
default:
+ pr_err("bad flag-op %c, at start of %s\n", *str, str);
return -EINVAL;
}
vpr_info("op='%c'\n", op);
- for ( ; *str ; ++str) {
+ for (; *str ; ++str) {
for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
if (*str == opt_array[i].opt_char) {
flags |= opt_array[i].flag;
break;
}
}
- if (i < 0)
+ if (i < 0) {
+ pr_err("unknown flag '%c' in \"%s\"\n", *str, str);
return -EINVAL;
+ }
}
vpr_info("flags=0x%x\n", flags);
@@ -450,16 +475,22 @@ static int ddebug_exec_query(char *query_string, const char *modname)
char *words[MAXWORDS];
nwords = ddebug_tokenize(query_string, words, MAXWORDS);
- if (nwords <= 0)
+ if (nwords <= 0) {
+ pr_err("tokenize failed\n");
return -EINVAL;
- if (ddebug_parse_query(words, nwords-1, &query, modname))
+ }
+ /* check flags 1st (last arg) so query is pairs of spec,val */
+ if (ddebug_parse_flags(words[nwords-1], &flags, &mask)) {
+ pr_err("flags parse failed\n");
return -EINVAL;
- if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
+ }
+ if (ddebug_parse_query(words, nwords-1, &query, modname)) {
+ pr_err("query parse failed\n");
return -EINVAL;
-
+ }
/* actually go and implement the change */
nfound = ddebug_change(&query, flags, mask);
- vpr_info_dq((&query), (nfound) ? "applied" : "no-match");
+ vpr_info_dq(&query, nfound ? "applied" : "no-match");
return nfound;
}
@@ -488,8 +519,9 @@ static int ddebug_exec_queries(char *query, const char *modname)
if (rc < 0) {
errs++;
exitcode = rc;
- } else
+ } else {
nfound += rc;
+ }
i++;
}
vpr_info("processed %d queries, with %d matches, %d errs\n",
@@ -765,7 +797,7 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos)
struct _ddebug *dp;
vpr_info("called m=%p p=%p *pos=%lld\n",
- m, p, (unsigned long long)*pos);
+ m, p, (unsigned long long)*pos);
if (p == SEQ_START_TOKEN)
dp = ddebug_iter_first(iter);
@@ -791,14 +823,14 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
if (p == SEQ_START_TOKEN) {
seq_puts(m,
- "# filename:lineno [module]function flags format\n");
+ "# filename:lineno [module]function flags format\n");
return 0;
}
seq_printf(m, "%s:%u [%s]%s =%s \"",
- trim_prefix(dp->filename), dp->lineno,
- iter->table->mod_name, dp->function,
- ddebug_describe_flags(dp, flagsbuf, sizeof(flagsbuf)));
+ trim_prefix(dp->filename), dp->lineno,
+ iter->table->mod_name, dp->function,
+ ddebug_describe_flags(dp, flagsbuf, sizeof(flagsbuf)));
seq_escape(m, dp->format, "\t\r\n\"");
seq_puts(m, "\"\n");
@@ -845,7 +877,7 @@ static int ddebug_proc_open(struct inode *inode, struct file *file)
kfree(iter);
return err;
}
- ((struct seq_file *) file->private_data)->private = iter;
+ ((struct seq_file *)file->private_data)->private = iter;
return 0;
}
@@ -1002,8 +1034,7 @@ static int __init dynamic_debug_init(void)
int verbose_bytes = 0;
if (__start___verbose == __stop___verbose) {
- pr_warn("_ddebug table is empty in a "
- "CONFIG_DYNAMIC_DEBUG build");
+ pr_warn("_ddebug table is empty in a CONFIG_DYNAMIC_DEBUG build\n");
return 1;
}
iter = __start___verbose;
@@ -1030,18 +1061,16 @@ static int __init dynamic_debug_init(void)
goto out_err;
ddebug_init_success = 1;
- vpr_info("%d modules, %d entries and %d bytes in ddebug tables,"
- " %d bytes in (readonly) verbose section\n",
- modct, entries, (int)( modct * sizeof(struct ddebug_table)),
- verbose_bytes + (int)(__stop___verbose - __start___verbose));
+ vpr_info("%d modules, %d entries and %d bytes in ddebug tables, %d bytes in (readonly) verbose section\n",
+ modct, entries, (int)(modct * sizeof(struct ddebug_table)),
+ verbose_bytes + (int)(__stop___verbose - __start___verbose));
/* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {
- pr_warn("ddebug_query param name is deprecated,"
- " change it to dyndbg\n");
+ pr_warn("ddebug_query param name is deprecated, change it to dyndbg\n");
ret = ddebug_exec_queries(ddebug_setup_string, NULL);
if (ret < 0)
- pr_warn("Invalid ddebug boot param %s",
+ pr_warn("Invalid ddebug boot param %s\n",
ddebug_setup_string);
else
pr_info("%d changes by ddebug_query\n", ret);
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 6540d657dca..3f0494c9d57 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -227,6 +227,7 @@ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
}
EXPORT_SYMBOL(print_hex_dump);
+#if !defined(CONFIG_DYNAMIC_DEBUG)
/**
* print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
* @prefix_str: string to prefix each line with;
@@ -246,4 +247,5 @@ void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
buf, len, true);
}
EXPORT_SYMBOL(print_hex_dump_bytes);
-#endif
+#endif /* !defined(CONFIG_DYNAMIC_DEBUG) */
+#endif /* defined(CONFIG_PRINTK) */
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 7aae0f2a5e0..c3eb261a7df 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -47,10 +47,10 @@ __setup("debug_locks_verbose=", setup_debug_locks_verbose);
* Normal standalone locks, for the circular and irq-context
* dependency tests:
*/
-static DEFINE_SPINLOCK(lock_A);
-static DEFINE_SPINLOCK(lock_B);
-static DEFINE_SPINLOCK(lock_C);
-static DEFINE_SPINLOCK(lock_D);
+static DEFINE_RAW_SPINLOCK(lock_A);
+static DEFINE_RAW_SPINLOCK(lock_B);
+static DEFINE_RAW_SPINLOCK(lock_C);
+static DEFINE_RAW_SPINLOCK(lock_D);
static DEFINE_RWLOCK(rwlock_A);
static DEFINE_RWLOCK(rwlock_B);
@@ -73,12 +73,12 @@ static DECLARE_RWSEM(rwsem_D);
* but X* and Y* are different classes. We do this so that
* we do not trigger a real lockup:
*/
-static DEFINE_SPINLOCK(lock_X1);
-static DEFINE_SPINLOCK(lock_X2);
-static DEFINE_SPINLOCK(lock_Y1);
-static DEFINE_SPINLOCK(lock_Y2);
-static DEFINE_SPINLOCK(lock_Z1);
-static DEFINE_SPINLOCK(lock_Z2);
+static DEFINE_RAW_SPINLOCK(lock_X1);
+static DEFINE_RAW_SPINLOCK(lock_X2);
+static DEFINE_RAW_SPINLOCK(lock_Y1);
+static DEFINE_RAW_SPINLOCK(lock_Y2);
+static DEFINE_RAW_SPINLOCK(lock_Z1);
+static DEFINE_RAW_SPINLOCK(lock_Z2);
static DEFINE_RWLOCK(rwlock_X1);
static DEFINE_RWLOCK(rwlock_X2);
@@ -107,10 +107,10 @@ static DECLARE_RWSEM(rwsem_Z2);
*/
#define INIT_CLASS_FUNC(class) \
static noinline void \
-init_class_##class(spinlock_t *lock, rwlock_t *rwlock, struct mutex *mutex, \
- struct rw_semaphore *rwsem) \
+init_class_##class(raw_spinlock_t *lock, rwlock_t *rwlock, \
+ struct mutex *mutex, struct rw_semaphore *rwsem)\
{ \
- spin_lock_init(lock); \
+ raw_spin_lock_init(lock); \
rwlock_init(rwlock); \
mutex_init(mutex); \
init_rwsem(rwsem); \
@@ -168,10 +168,10 @@ static void init_shared_classes(void)
* Shortcuts for lock/unlock API variants, to keep
* the testcases compact:
*/
-#define L(x) spin_lock(&lock_##x)
-#define U(x) spin_unlock(&lock_##x)
+#define L(x) raw_spin_lock(&lock_##x)
+#define U(x) raw_spin_unlock(&lock_##x)
#define LU(x) L(x); U(x)
-#define SI(x) spin_lock_init(&lock_##x)
+#define SI(x) raw_spin_lock_init(&lock_##x)
#define WL(x) write_lock(&rwlock_##x)
#define WU(x) write_unlock(&rwlock_##x)
@@ -911,7 +911,7 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
#define I2(x) \
do { \
- spin_lock_init(&lock_##x); \
+ raw_spin_lock_init(&lock_##x); \
rwlock_init(&rwlock_##x); \
mutex_init(&mutex_##x); \
init_rwsem(&rwsem_##x); \
diff --git a/lib/mpi/mpi-internal.h b/lib/mpi/mpi-internal.h
index 77adcf6bc25..60cf765628e 100644
--- a/lib/mpi/mpi-internal.h
+++ b/lib/mpi/mpi-internal.h
@@ -65,10 +65,6 @@
typedef mpi_limb_t *mpi_ptr_t; /* pointer to a limb */
typedef int mpi_size_t; /* (must be a signed type) */
-#define ABS(x) (x >= 0 ? x : -x)
-#define MIN(l, o) ((l) < (o) ? (l) : (o))
-#define MAX(h, i) ((h) > (i) ? (h) : (i))
-
static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
{
if (a->alloced < b)
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index 3962b7f7fe3..5f9c44cdf1f 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -52,7 +52,7 @@ MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes)
else
nbits = 0;
- nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
+ nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
val = mpi_alloc(nlimbs);
if (!val)
return NULL;
@@ -96,8 +96,8 @@ MPI mpi_read_from_buffer(const void *xbuffer, unsigned *ret_nread)
buffer += 2;
nread = 2;
- nbytes = (nbits + 7) / 8;
- nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
+ nbytes = DIV_ROUND_UP(nbits, 8);
+ nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
val = mpi_alloc(nlimbs);
if (!val)
return NULL;
@@ -193,7 +193,7 @@ int mpi_set_buffer(MPI a, const void *xbuffer, unsigned nbytes, int sign)
int nlimbs;
int i;
- nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
+ nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
if (RESIZE_IF_NEEDED(a, nlimbs) < 0)
return -ENOMEM;
a->sign = sign;
diff --git a/lib/parser.c b/lib/parser.c
index 52cfa69f73d..807b2aaa33f 100644
--- a/lib/parser.c
+++ b/lib/parser.c
@@ -157,7 +157,7 @@ static int match_number(substring_t *s, int *result, int base)
*
* Description: Attempts to parse the &substring_t @s as a decimal integer. On
* success, sets @result to the integer represented by the string and returns 0.
- * Returns either -ENOMEM or -EINVAL on failure.
+ * Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
*/
int match_int(substring_t *s, int *result)
{
@@ -171,7 +171,7 @@ int match_int(substring_t *s, int *result)
*
* Description: Attempts to parse the &substring_t @s as an octal integer. On
* success, sets @result to the integer represented by the string and returns
- * 0. Returns either -ENOMEM or -EINVAL on failure.
+ * 0. Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
*/
int match_octal(substring_t *s, int *result)
{
@@ -185,7 +185,7 @@ int match_octal(substring_t *s, int *result)
*
* Description: Attempts to parse the &substring_t @s as a hexadecimal integer.
* On success, sets @result to the integer represented by the string and
- * returns 0. Returns either -ENOMEM or -EINVAL on failure.
+ * returns 0. Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
*/
int match_hex(substring_t *s, int *result)
{
diff --git a/lib/rwsem-spinlock.c b/lib/rwsem-spinlock.c
index 7e0d6a58fc8..7542afbb22b 100644
--- a/lib/rwsem-spinlock.c
+++ b/lib/rwsem-spinlock.c
@@ -73,20 +73,13 @@ __rwsem_do_wake(struct rw_semaphore *sem, int wakewrite)
goto dont_wake_writers;
}
- /* if we are allowed to wake writers try to grant a single write lock
- * if there's a writer at the front of the queue
- * - we leave the 'waiting count' incremented to signify potential
- * contention
+ /*
+ * as we support write lock stealing, we can't set sem->activity
+ * to -1 here to indicate we get the lock. Instead, we wake it up
+ * to let it go get it again.
*/
if (waiter->flags & RWSEM_WAITING_FOR_WRITE) {
- sem->activity = -1;
- list_del(&waiter->list);
- tsk = waiter->task;
- /* Don't touch waiter after ->task has been NULLed */
- smp_mb();
- waiter->task = NULL;
- wake_up_process(tsk);
- put_task_struct(tsk);
+ wake_up_process(waiter->task);
goto out;
}
@@ -121,18 +114,10 @@ static inline struct rw_semaphore *
__rwsem_wake_one_writer(struct rw_semaphore *sem)
{
struct rwsem_waiter *waiter;
- struct task_struct *tsk;
-
- sem->activity = -1;
waiter = list_entry(sem->wait_list.next, struct rwsem_waiter, list);
- list_del(&waiter->list);
+ wake_up_process(waiter->task);
- tsk = waiter->task;
- smp_mb();
- waiter->task = NULL;
- wake_up_process(tsk);
- put_task_struct(tsk);
return sem;
}
@@ -204,7 +189,6 @@ int __down_read_trylock(struct rw_semaphore *sem)
/*
* get a write lock on the semaphore
- * - we increment the waiting count anyway to indicate an exclusive lock
*/
void __sched __down_write_nested(struct rw_semaphore *sem, int subclass)
{
@@ -214,37 +198,32 @@ void __sched __down_write_nested(struct rw_semaphore *sem, int subclass)
raw_spin_lock_irqsave(&sem->wait_lock, flags);
- if (sem->activity == 0 && list_empty(&sem->wait_list)) {
- /* granted */
- sem->activity = -1;
- raw_spin_unlock_irqrestore(&sem->wait_lock, flags);
- goto out;
- }
-
- tsk = current;
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
-
/* set up my own style of waitqueue */
+ tsk = current;
waiter.task = tsk;
waiter.flags = RWSEM_WAITING_FOR_WRITE;
- get_task_struct(tsk);
-
list_add_tail(&waiter.list, &sem->wait_list);
- /* we don't need to touch the semaphore struct anymore */
- raw_spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- /* wait to be given the lock */
+ /* wait for someone to release the lock */
for (;;) {
- if (!waiter.task)
+ /*
+ * That is the key to support write lock stealing: allows the
+ * task already on CPU to get the lock soon rather than put
+ * itself into sleep and waiting for system woke it or someone
+ * else in the head of the wait list up.
+ */
+ if (sem->activity == 0)
break;
- schedule();
set_task_state(tsk, TASK_UNINTERRUPTIBLE);
+ raw_spin_unlock_irqrestore(&sem->wait_lock, flags);
+ schedule();
+ raw_spin_lock_irqsave(&sem->wait_lock, flags);
}
+ /* got the lock */
+ sem->activity = -1;
+ list_del(&waiter.list);
- tsk->state = TASK_RUNNING;
- out:
- ;
+ raw_spin_unlock_irqrestore(&sem->wait_lock, flags);
}
void __sched __down_write(struct rw_semaphore *sem)
@@ -262,8 +241,8 @@ int __down_write_trylock(struct rw_semaphore *sem)
raw_spin_lock_irqsave(&sem->wait_lock, flags);
- if (sem->activity == 0 && list_empty(&sem->wait_list)) {
- /* granted */
+ if (sem->activity == 0) {
+ /* got the lock */
sem->activity = -1;
ret = 1;
}
diff --git a/lib/rwsem.c b/lib/rwsem.c
index 8337e1b9bb8..ad5e0df16ab 100644
--- a/lib/rwsem.c
+++ b/lib/rwsem.c
@@ -2,6 +2,8 @@
*
* Written by David Howells (dhowells@redhat.com).
* Derived from arch/i386/kernel/semaphore.c
+ *
+ * Writer lock-stealing by Alex Shi <alex.shi@intel.com>
*/
#include <linux/rwsem.h>
#include <linux/sched.h>
@@ -60,7 +62,7 @@ __rwsem_do_wake(struct rw_semaphore *sem, int wake_type)
struct r