From c5879860eac64ddd7bec4ba50c9adbfebcbf1d2e Mon Sep 17 00:00:00 2001 From: Blazej Kucman Date: Wed, 15 May 2024 13:26:28 +0200 Subject: [PATCH 1/1] mdadm: Fix compilation for 32-bit arch MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Casting void pointer to __u64 works for 64-bit arch but fails to compile on 32-bit arch like i686. Fail on i686 platform: drive_encryption.c: In function ‘nvme_security_recv_ioctl’: drive_encryption.c:236:25: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] 236 | nvme_cmd.addr = (__u64)response_buffer; | ^ drive_encryption.c: In function ‘nvme_identify_ioctl’: drive_encryption.c:271:25: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] 271 | nvme_cmd.addr = (__u64)response_buffer; | ^ cc1: all warnings being treated as errors make: *** [Makefile:211: drive_encryption.o] Error 1 This change adds cast void pointer to uintptr_t first to ensure that proper pointer size is used for casting from pointer type. Then is safe to cast it to __u64 because it is tracked as u_int, regardless it is 32-bit or 64-bit arch. Reported-by: Xiao Ni Fixes: cc48406887b3 ("Add reading Opal NVMe encryption information") Signed-off-by: Blazej Kucman --- drive_encryption.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drive_encryption.c b/drive_encryption.c index 27da9621..a4ad799f 100644 --- a/drive_encryption.c +++ b/drive_encryption.c @@ -233,7 +233,7 @@ nvme_security_recv_ioctl(int disk_fd, __u8 sec_protocol, __u16 comm_id, void *re nvme_cmd.cdw10 = sec_protocol << 24 | comm_id << 8; nvme_cmd.cdw11 = buf_size; nvme_cmd.data_len = buf_size; - nvme_cmd.addr = (__u64)response_buffer; + nvme_cmd.addr = (__u64)(uintptr_t)response_buffer; status = ioctl(disk_fd, NVME_IOCTL_ADMIN_CMD, &nvme_cmd); if (status != 0) { @@ -268,7 +268,7 @@ nvme_identify_ioctl(int disk_fd, void *response_buffer, size_t buf_size, const i nvme_cmd.opcode = NVME_IDENTIFY; nvme_cmd.cdw10 = NVME_IDENTIFY_CONTROLLER_DATA; nvme_cmd.data_len = buf_size; - nvme_cmd.addr = (__u64)response_buffer; + nvme_cmd.addr = (__u64)(uintptr_t)response_buffer; status = ioctl(disk_fd, NVME_IOCTL_ADMIN_CMD, &nvme_cmd); if (status != 0) { -- 2.41.0