From 652a86b24c5ac444afaf7625c9340d55aab7f105 Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Fri, 31 Oct 2025 14:08:32 +0100 Subject: [PATCH] err.h: add INIT_ERR_PTR() macro Add INIT_ERR_PTR() macro to initialize static variables with error pointers. This might be useful for specific case where there is a static variable initialized to an error condition and then later set to the real handle once probe finish/completes. This is to handle compilation problems like: error: initializer element is not constant where ERR_PTR() can't be used. Signed-off-by: Christian Marangi Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20251031130835.7953-2-ansuelsmth@gmail.com [bjorn: Added () suffix on macro references] Signed-off-by: Bjorn Andersson --- include/linux/err.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/err.h b/include/linux/err.h index 1d60aa86db53..8c37be0620ab 100644 --- a/include/linux/err.h +++ b/include/linux/err.h @@ -41,6 +41,14 @@ static inline void * __must_check ERR_PTR(long error) return (void *) error; } +/** + * INIT_ERR_PTR - Init a const error pointer. + * @error: A negative error code. + * + * Like ERR_PTR(), but usable to initialize static variables. + */ +#define INIT_ERR_PTR(error) ((void *)(error)) + /* Return the pointer in the percpu address space. */ #define ERR_PTR_PCPU(error) ((void __percpu *)(unsigned long)ERR_PTR(error))