memremap() is declared in linux/io.h, not in asm/io.h, so we should include that header to avoid build errors: drivers/platform/x86/dcdbas.c: In function 'dcdbas_check_wsmt': drivers/platform/x86/dcdbas.c:572:15: error: implicit declaration of function 'memremap'; did you mean 'ioremap'? [-Werror=implicit-function-declaration] eps_buffer = memremap(eps->smm_comm_buff_addr, remap_size, MEMREMAP_WB); ^~~~~~~~ ioremap drivers/platform/x86/dcdbas.c:572:61: error: 'MEMREMAP_WB' undeclared (first use in this function) eps_buffer = memremap(eps->smm_comm_buff_addr, remap_size, MEMREMAP_WB); ^~~~~~~~~~~ drivers/platform/x86/dcdbas.c:572:61: note: each undeclared identifier is reported only once for each function it appears in drivers/platform/x86/dcdbas.c: In function 'dcdbas_exit': drivers/platform/x86/dcdbas.c:748:3: error: implicit declaration of function 'memunmap'; did you mean 'vm_munmap'? [-Werror=implicit-function-declaration] Fixes: 12c956c4f32e ("firmware: dcdbas: Add support for WSMT ACPI table") Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- drivers/platform/x86/dcdbas.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/platform/x86/dcdbas.c b/drivers/platform/x86/dcdbas.c index ae28e48ff7dc..daa7e3574568 100644 --- a/drivers/platform/x86/dcdbas.c +++ b/drivers/platform/x86/dcdbas.c @@ -37,7 +37,7 @@ #include <linux/string.h> #include <linux/types.h> #include <linux/mutex.h> -#include <asm/io.h> +#include <linux/io.h> #include "dcdbas.h" -- 2.18.0