From: Ard Biesheuvel <[email protected]> SH performs cache maintenance on the zero page during boot, presumably to ensure that any clearing of BSS that has occurred at startup is visible to other CPUs and DMA devices.
The __flush_wback_region() function takes a void* argument, which is conceptually sound, but given that empty_zero_page[] must never be modified, it is being repainted as const, making it incompatible with a void* formal parameter. Given the above, and the fact that __flush_wback_region() is in fact a function pointer variable with multiple implementations, take the easy way out, and cast away the constness in this particular invocation. Cc: Yoshinori Sato <[email protected]> Cc: Rich Felker <[email protected]> Cc: John Paul Adrian Glaubitz <[email protected]> Signed-off-by: Ard Biesheuvel <[email protected]> --- arch/sh/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 4e40d5e96be9..acbb481cdbfe 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -332,7 +332,7 @@ void __init mem_init(void) cpu_cache_init(); /* clear the zero-page */ - __flush_wback_region(empty_zero_page, PAGE_SIZE); + __flush_wback_region((void *)empty_zero_page, PAGE_SIZE); vsyscall_init(); -- 2.54.0.794.g4f17f83d09-goog
