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

kees · torvalds · commit b562c171cf01 · 2017-12-05T17:14:31.000-08:00
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: 7a46ec0 ("locking/refcounts, x86/asm: Implement fast refcount overflow protection") Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git 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

Original file line number	Diff line number	Diff line change
`@@ -82,7 +82,7 @@ bool ex_handler_refcount(const struct exception_table_entry *fixup,`
`82`	`82`
`83`	`83`	`return true;`
`84`	`84`	`}`
`85`		`-EXPORT_SYMBOL_GPL(ex_handler_refcount);`
	`85`	`+EXPORT_SYMBOL(ex_handler_refcount);`
`86`	`86`
`87`	`87`	`/*`
`88`	`88`	`* Handler for when we fail to restore a task's FPU state. We should never get`