Commit 652a86b2 authored Oct 31, 2025 by Christian Marangi Committed by Bjorn Andersson Nov 01, 2025

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 <ansuelsmth@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20251031130835.7953-2-ansuelsmth@gmail.com


[bjorn: Added () suffix on macro references]
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

parent dc5db350

include/linux/err.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -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))