This stack check implementation leverages the compiler's profiling (gcc -p)

[linux-2.6.git] / sound / oss / msnd.c

diff --git a/sound/oss/msnd.c b/sound/oss/msnd.c
index 3fdbaf5..6ccdd09 100644 (file)
--- a/sound/oss/msnd.c
+++ b/sound/oss/msnd.c
@@ -139,13 +139,10 @@ void msnd_fifo_make_empty(msnd_fifo *f)
        f->len = f->tail = f->head = 0;
 }
 
-int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len, int user)
+int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len)
 {
        int count = 0;
 
-       if (f->len == f->n)
-               return 0;
-
        while ((count < len) && (f->len != f->n)) {
 
                int nwritten;
@@ -161,11 +158,7 @@ int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len, int user)
                                nwritten = len - count;
                }
 
-               if (user) {
-                       if (copy_from_user(f->data + f->tail, buf, nwritten))
-                               return -EFAULT;
-               } else
-                       isa_memcpy_fromio(f->data + f->tail, (unsigned long) buf, nwritten);
+               isa_memcpy_fromio(f->data + f->tail, (unsigned long) buf, nwritten);
 
                count += nwritten;
                buf += nwritten;
@@ -177,13 +170,10 @@ int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len, int user)
        return count;
 }
 
-int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len, int user)
+int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len)
 {
        int count = 0;
 
-       if (f->len == 0)
-               return f->len;
-
        while ((count < len) && (f->len > 0)) {
 
                int nread;
@@ -199,11 +189,7 @@ int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len, int user)
                                nread = len - count;
                }
 
-               if (user) {
-                       if (copy_to_user(buf, f->data + f->head, nread))
-                               return -EFAULT;
-               } else
-                       isa_memcpy_toio((unsigned long) buf, f->data + f->head, nread);
+               isa_memcpy_toio((unsigned long) buf, f->data + f->head, nread);
 
                count += nread;
                buf += nread;