Please backport this commit for 4.4: a9aec5881b9d4aca184b29d33484a6a58d23f7f2(lib/iomap_copy.c: add __ioread32_copy()) Huacai ---- This commit has been processed because it contains a -stable tag. The stable tag indicates that it's relevant for the following trees: all The bot has tested the following trees: v5.1.9, v4.19.50, v4.14.125, v4.9.181, v4.4.181. v5.1.9: Build OK! v4.19.50: Build OK! v4.14.125: Build OK! v4.9.181: Build OK! v4.4.181: Build failed! Errors: drivers/scsi/lpfc/lpfc_compat.h:93:2: error: implicit declaration of function ‘__ioread32_copy’; did you mean ‘__iowrite32_copy’? [-Werror=implicit-function-declaration] How should we proceed with this patch? -- Thanks, Sasha