USB: gadget: g_multi: code clean up and refactoring

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / compat.c

diff --git a/kernel/compat.c b/kernel/compat.c
index 7f40e92..e167efc 100644 (file)
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -279,11 +279,6 @@ asmlinkage long compat_sys_setrlimit(unsigned int resource,
                struct compat_rlimit __user *rlim)
 {
        struct rlimit r;
-       int ret;
-       mm_segment_t old_fs = get_fs ();
-
-       if (resource >= RLIM_NLIMITS)
-               return -EINVAL;
 
        if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
            __get_user(r.rlim_cur, &rlim->rlim_cur) ||
@@ -294,10 +289,7 @@ asmlinkage long compat_sys_setrlimit(unsigned int resource,
                r.rlim_cur = RLIM_INFINITY;
        if (r.rlim_max == COMPAT_RLIM_INFINITY)
                r.rlim_max = RLIM_INFINITY;
-       set_fs(KERNEL_DS);
-       ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
-       set_fs(old_fs);
-       return ret;
+       return do_prlimit(current, resource, &r, NULL);
 }
 
 #ifdef COMPAT_RLIM_OLD_INFINITY
@@ -329,16 +321,13 @@ asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
 
 #endif
 
-asmlinkage long compat_sys_getrlimit (unsigned int resource,
+asmlinkage long compat_sys_getrlimit(unsigned int resource,
                struct compat_rlimit __user *rlim)
 {
        struct rlimit r;
        int ret;
-       mm_segment_t old_fs = get_fs();
 
-       set_fs(KERNEL_DS);
-       ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
-       set_fs(old_fs);
+       ret = do_prlimit(current, resource, NULL, &r);
        if (!ret) {
                if (r.rlim_cur > COMPAT_RLIM_INFINITY)
                        r.rlim_cur = COMPAT_RLIM_INFINITY;
@@ -495,29 +484,26 @@ asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
 {
        int ret;
        cpumask_var_t mask;
-       unsigned long *k;
-       unsigned int min_length = cpumask_size();
-
-       if (nr_cpu_ids <= BITS_PER_COMPAT_LONG)
-               min_length = sizeof(compat_ulong_t);
 
-       if (len < min_length)
+       if ((len * BITS_PER_BYTE) < nr_cpu_ids)
+               return -EINVAL;
+       if (len & (sizeof(compat_ulong_t)-1))
                return -EINVAL;
 
        if (!alloc_cpumask_var(&mask, GFP_KERNEL))
                return -ENOMEM;
 
        ret = sched_getaffinity(pid, mask);
-       if (ret < 0)
-               goto out;
+       if (ret == 0) {
+               size_t retlen = min_t(size_t, len, cpumask_size());
 
-       k = cpumask_bits(mask);
-       ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
-       if (ret == 0)
-               ret = min_length;
-
-out:
+               if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8))
+                       ret = -EFAULT;
+               else
+                       ret = retlen;
+       }
        free_cpumask_var(mask);
+
        return ret;
 }