[PATCH v2 net-next 2/3] kernel: Make compat bitmap functions externally visible

[Tom Herbert <tom@herbertland.com>]

Export compat_get_bitmap and compat_put_bitmap. Make
compat_get_user_cpu_mask not static, add prototype in compat.h, and
export it.

Signed-off-by: Tom Herbert <tom@herbertland.com>
---
 include/linux/compat.h | 2 ++
 kernel/compat.c        | 7 +++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/linux/compat.h b/include/linux/compat.h
index ab25814..b52bc0c 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -380,6 +380,8 @@ long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 		       unsigned long bitmap_size);
 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 		       unsigned long bitmap_size);
+int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
+			     unsigned len, struct cpumask *new_mask);
 int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
 int get_compat_sigevent(struct sigevent *event,
diff --git a/kernel/compat.c b/kernel/compat.c
index 24f0061..0b74ad9 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -599,8 +599,8 @@ COMPAT_SYSCALL_DEFINE5(waitid,
 	return copy_siginfo_to_user32(uinfo, &info);
 }
 
-static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
-				    unsigned len, struct cpumask *new_mask)
+int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
+			     unsigned len, struct cpumask *new_mask)
 {
 	unsigned long *k;
 
@@ -612,6 +612,7 @@ static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
 	k = cpumask_bits(new_mask);
 	return compat_get_bitmap(k, user_mask_ptr, len * 8);
 }
+EXPORT_SYMBOL_GPL(compat_get_user_cpu_mask);
 
 COMPAT_SYSCALL_DEFINE3(sched_setaffinity, compat_pid_t, pid,
 		       unsigned int, len,
@@ -927,6 +928,7 @@ long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(compat_get_bitmap);
 
 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 		       unsigned long bitmap_size)
@@ -967,6 +969,7 @@ long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(compat_put_bitmap);
 
 void
 sigset_from_compat(sigset_t *set, const compat_sigset_t *compat)
-- 
1.8.1