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efi/libstub: Add efi_warn and *_once logging helpers

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

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200914213535.933454-1-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Arvind Sankar 2020-09-14 17:35:34 -04:00 committed by Ard Biesheuvel
parent 726bd8965a
commit c1df5e0c57
1 changed files with 23 additions and 0 deletions
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23
drivers/firmware/efi/libstub/efistub.h
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@ -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) \