From: Kees Cook <keescook@chromium.org>
Date: Tue, 5 Dec 2017 01:24:54 +0000 (-0800)
Subject: locking/refcounts: Do not force refcount_t usage as GPL-only export
X-Git-Tag: v4.14.5~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c3b0874866f2282f51295dc4cf69672b2caf6039;p=platform%2Fkernel%2Flinux-rpi.git

locking/refcounts: Do not force refcount_t usage as GPL-only export

commit b562c171cf011d297059bd0265742eb5fab0ad2f upstream.

The refcount_t protection on x86 was not intended to use the stricter
GPL export. This adjusts the linkage again to avoid a regression in
the availability of the refcount API.

Reported-by: Dave Airlie <airlied@gmail.com>
Fixes: 7a46ec0e2f48 ("locking/refcounts, x86/asm: Implement fast refcount overflow protection")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ivan Kozik <ivan@ludios.org>
Cc: Thomas Backlund <tmb@mageia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
index 3321b44..30bc481 100644
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -82,7 +82,7 @@ bool ex_handler_refcount(const struct exception_table_entry *fixup,
 
 	return true;
 }
-EXPORT_SYMBOL_GPL(ex_handler_refcount);
+EXPORT_SYMBOL(ex_handler_refcount);
 
 /*
  * Handler for when we fail to restore a task's FPU state.  We should never get