Commit c1df5e0c authored by Arvind Sankar's avatar Arvind Sankar Committed by Ard Biesheuvel
Browse files

efi/libstub: Add efi_warn and *_once logging helpers 



Add an efi_warn logging helper for warnings, and implement an analog of
printk_once for once-only logging.

Signed-off-by: default avatarArvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200914213535.933454-1-nivedita@alum.mit.edu


Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 726bd896

drivers/firmware/efi/libstub/efistub.h

+23 −0
Original line number Diff line number Diff line
@@ -52,11 +52,34 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, 


#define efi_info(fmt, ...) \

	efi_printk(KERN_INFO fmt, ##__VA_ARGS__)

#define efi_warn(fmt, ...) \

	efi_printk(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)

#define efi_err(fmt, ...) \

	efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)

#define efi_debug(fmt, ...) \

	efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)



#define efi_printk_once(fmt, ...) 		\

({						\

	static bool __print_once;		\

	bool __ret_print_once = !__print_once;	\

						\

	if (!__print_once) {			\

		__print_once = true;		\

		efi_printk(fmt, ##__VA_ARGS__);	\

	}					\

	__ret_print_once;			\

})



#define efi_info_once(fmt, ...) \

	efi_printk_once(KERN_INFO fmt, ##__VA_ARGS__)

#define efi_warn_once(fmt, ...) \

	efi_printk_once(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__)

#define efi_err_once(fmt, ...) \

	efi_printk_once(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)

#define efi_debug_once(fmt, ...) \

	efi_printk_once(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)



/* Helper macros for the usual case of using simple C variables: */

#ifndef fdt_setprop_inplace_var

#define fdt_setprop_inplace_var(fdt, node_offset, name, var) \

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