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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-27 10:42:53 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-27 10:42:53 +0900
commit4993632218e2202d4f110c8e83ae819ca26e6845 (patch)
tree0872195b8c09b03d54adaaaf4304d1285091b031 /lib
parent1c4e2d70afb132058bfe979f6854c1d0a732b556 (diff)
parente4aa937ec75df0eea0bee03bffa3303ad36c986b (diff)
downloadlinux-4993632218e2202d4f110c8e83ae819ca26e6845.tar.bz2
Merge 3.10-rc3 into driver-core-next
We want the changes here. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/Makefile2
-rw-r--r--lib/iovec.c53
-rw-r--r--lib/klist.c2
-rw-r--r--lib/mpi/longlong.h5
4 files changed, 58 insertions, 4 deletions
diff --git a/lib/Makefile b/lib/Makefile
index e9c52e1b853a..c55a037a354e 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -23,7 +23,7 @@ lib-y += kobject.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 \
- gcd.o lcm.o list_sort.o uuid.o flex_array.o \
+ gcd.o lcm.o list_sort.o uuid.o flex_array.o iovec.o \
bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o
obj-y += string_helpers.o
obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
diff --git a/lib/iovec.c b/lib/iovec.c
new file mode 100644
index 000000000000..454baa88bf27
--- /dev/null
+++ b/lib/iovec.c
@@ -0,0 +1,53 @@
+#include <linux/uaccess.h>
+#include <linux/export.h>
+#include <linux/uio.h>
+
+/*
+ * Copy iovec to kernel. Returns -EFAULT on error.
+ *
+ * Note: this modifies the original iovec.
+ */
+
+int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len)
+{
+ while (len > 0) {
+ if (iov->iov_len) {
+ int copy = min_t(unsigned int, len, iov->iov_len);
+ if (copy_from_user(kdata, iov->iov_base, copy))
+ return -EFAULT;
+ len -= copy;
+ kdata += copy;
+ iov->iov_base += copy;
+ iov->iov_len -= copy;
+ }
+ iov++;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(memcpy_fromiovec);
+
+/*
+ * Copy kernel to iovec. Returns -EFAULT on error.
+ *
+ * Note: this modifies the original iovec.
+ */
+
+int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
+{
+ while (len > 0) {
+ if (iov->iov_len) {
+ int copy = min_t(unsigned int, iov->iov_len, len);
+ if (copy_to_user(iov->iov_base, kdata, copy))
+ return -EFAULT;
+ kdata += copy;
+ len -= copy;
+ iov->iov_len -= copy;
+ iov->iov_base += copy;
+ }
+ iov++;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(memcpy_toiovec);
diff --git a/lib/klist.c b/lib/klist.c
index 0874e41609a6..358a368a2947 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -193,10 +193,10 @@ static void klist_release(struct kref *kref)
if (waiter->node != n)
continue;
+ list_del(&waiter->list);
waiter->woken = 1;
mb();
wake_up_process(waiter->process);
- list_del(&waiter->list);
}
spin_unlock(&klist_remove_lock);
knode_set_klist(n, NULL);
diff --git a/lib/mpi/longlong.h b/lib/mpi/longlong.h
index 095ab157a521..d411355f238e 100644
--- a/lib/mpi/longlong.h
+++ b/lib/mpi/longlong.h
@@ -318,7 +318,8 @@ extern UDItype __udiv_qrnnd();
"rM" ((USItype)(bh)), \
"rM" ((USItype)(al)), \
"rM" ((USItype)(bl)))
-#if defined(_PA_RISC1_1)
+#if 0 && defined(_PA_RISC1_1)
+/* xmpyu uses floating point register which is not allowed in Linux kernel. */
#define umul_ppmm(wh, wl, u, v) \
do { \
union {UDItype __ll; \
@@ -337,7 +338,7 @@ do { \
#define UMUL_TIME 40
#define UDIV_TIME 80
#endif
-#ifndef LONGLONG_STANDALONE
+#if 0 /* #ifndef LONGLONG_STANDALONE */
#define udiv_qrnnd(q, r, n1, n0, d) \
do { USItype __r; \
(q) = __udiv_qrnnd(&__r, (n1), (n0), (d)); \