summaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/dma-debug.c2
-rw-r--r--lib/idr.c4
-rw-r--r--lib/string.c27
-rw-r--r--lib/zlib_inflate/inffast.c32
4 files changed, 60 insertions, 5 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 7d2f0b33e5a8..ba8b67039d13 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -587,7 +587,7 @@ out_unlock:
return count;
}
-const struct file_operations filter_fops = {
+static const struct file_operations filter_fops = {
.read = filter_read,
.write = filter_write,
};
diff --git a/lib/idr.c b/lib/idr.c
index 1cac726c44bc..0dc782216d4b 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -156,10 +156,12 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa)
id = (id | ((1 << (IDR_BITS * l)) - 1)) + 1;
/* if already at the top layer, we need to grow */
- if (!(p = pa[l])) {
+ if (id >= 1 << (idp->layers * IDR_BITS)) {
*starting_id = id;
return IDR_NEED_TO_GROW;
}
+ p = pa[l];
+ BUG_ON(!p);
/* If we need to go up one layer, continue the
* loop; otherwise, restart from the top.
diff --git a/lib/string.c b/lib/string.c
index 9f75b4ec50b8..a1cdcfcc42d0 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -667,7 +667,7 @@ EXPORT_SYMBOL(memscan);
*/
char *strstr(const char *s1, const char *s2)
{
- int l1, l2;
+ size_t l1, l2;
l2 = strlen(s2);
if (!l2)
@@ -684,6 +684,31 @@ char *strstr(const char *s1, const char *s2)
EXPORT_SYMBOL(strstr);
#endif
+#ifndef __HAVE_ARCH_STRNSTR
+/**
+ * strnstr - Find the first substring in a length-limited string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ * @len: the maximum number of characters to search
+ */
+char *strnstr(const char *s1, const char *s2, size_t len)
+{
+ size_t l1 = len, l2;
+
+ l2 = strlen(s2);
+ if (!l2)
+ return (char *)s1;
+ while (l1 >= l2) {
+ l1--;
+ if (!memcmp(s1, s2, l2))
+ return (char *)s1;
+ s1++;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(strnstr);
+#endif
+
#ifndef __HAVE_ARCH_MEMCHR
/**
* memchr - Find a character in an area of memory.
diff --git a/lib/zlib_inflate/inffast.c b/lib/zlib_inflate/inffast.c
index 05e1559fa156..215447c55261 100644
--- a/lib/zlib_inflate/inffast.c
+++ b/lib/zlib_inflate/inffast.c
@@ -4,12 +4,25 @@
*/
#include <linux/zutil.h>
-#include <asm/unaligned.h>
-#include <asm/byteorder.h>
#include "inftrees.h"
#include "inflate.h"
#include "inffast.h"
+/* Only do the unaligned "Faster" variant when
+ * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set
+ *
+ * On powerpc, it won't be as we don't include autoconf.h
+ * automatically for the boot wrapper, which is intended as
+ * we run in an environment where we may not be able to deal
+ * with (even rare) alignment faults. In addition, we do not
+ * define __KERNEL__ for arch/powerpc/boot unlike x86
+ */
+
+#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+#include <asm/unaligned.h>
+#include <asm/byteorder.h>
+#endif
+
#ifndef ASMINF
/* Allow machine dependent optimization for post-increment or pre-increment.
@@ -243,6 +256,7 @@ void inflate_fast(z_streamp strm, unsigned start)
}
}
else {
+#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
unsigned short *sout;
unsigned long loops;
@@ -284,6 +298,20 @@ void inflate_fast(z_streamp strm, unsigned start)
}
if (len & 1)
PUP(out) = PUP(from);
+#else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */
+ from = out - dist; /* copy direct from output */
+ do { /* minimum length is three */
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ PUP(out) = PUP(from);
+ len -= 3;
+ } while (len > 2);
+ if (len) {
+ PUP(out) = PUP(from);
+ if (len > 1)
+ PUP(out) = PUP(from);
+ }
+#endif /* !CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */
}
}
else if ((op & 64) == 0) { /* 2nd level distance code */