[PATCH] i386: Remove copy_*_user BUG_ONs for (size < 0)

access_ok checks this case anyways, no need to check twice.

Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/i386/lib/usercopy.c b/arch/i386/lib/usercopy.c
index 086b3726862aaee1117a909666c2a748aa58162a..9f38b12b4af1bf103b1261b1ceee185c541a28cd 100644 (file)
--- a/arch/i386/lib/usercopy.c
+++ b/arch/i386/lib/usercopy.c
@@ -716,7 +716,6 @@ do {                                                                        \
 unsigned long __copy_to_user_ll(void __user *to, const void *from,
                                unsigned long n)
 {
-       BUG_ON((long) n < 0);
 #ifndef CONFIG_X86_WP_WORKS_OK
        if (unlikely(boot_cpu_data.wp_works_ok == 0) &&
                        ((unsigned long )to) < TASK_SIZE) {
@@ -785,7 +784,6 @@ EXPORT_SYMBOL(__copy_to_user_ll);
 unsigned long __copy_from_user_ll(void *to, const void __user *from,
                                        unsigned long n)
 {
-       BUG_ON((long)n < 0);
        if (movsl_is_ok(to, from, n))
                __copy_user_zeroing(to, from, n);
        else
@@ -797,7 +795,6 @@ EXPORT_SYMBOL(__copy_from_user_ll);
 unsigned long __copy_from_user_ll_nozero(void *to, const void __user *from,
                                         unsigned long n)
 {
-       BUG_ON((long)n < 0);
        if (movsl_is_ok(to, from, n))
                __copy_user(to, from, n);
        else
@@ -810,7 +807,6 @@ EXPORT_SYMBOL(__copy_from_user_ll_nozero);
 unsigned long __copy_from_user_ll_nocache(void *to, const void __user *from,
                                        unsigned long n)
 {
-       BUG_ON((long)n < 0);
 #ifdef CONFIG_X86_INTEL_USERCOPY
        if ( n > 64 && cpu_has_xmm2)
                 n = __copy_user_zeroing_intel_nocache(to, from, n);
@@ -825,7 +821,6 @@ unsigned long __copy_from_user_ll_nocache(void *to, const void __user *from,
 unsigned long __copy_from_user_ll_nocache_nozero(void *to, const void __user *from,
                                        unsigned long n)
 {
-       BUG_ON((long)n < 0);
 #ifdef CONFIG_X86_INTEL_USERCOPY
        if ( n > 64 && cpu_has_xmm2)
                 n = __copy_user_intel_nocache(to, from, n);
@@ -853,7 +848,6 @@ unsigned long __copy_from_user_ll_nocache_nozero(void *to, const void __user *fr
 unsigned long
 copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-       BUG_ON((long) n < 0);
        if (access_ok(VERIFY_WRITE, to, n))
                n = __copy_to_user(to, from, n);
        return n;
@@ -879,7 +873,6 @@ EXPORT_SYMBOL(copy_to_user);
 unsigned long
 copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-       BUG_ON((long) n < 0);
        if (access_ok(VERIFY_READ, from, n))
                n = __copy_from_user(to, from, n);
        else