Commit 0303ce17 authored by Hailong Liu's avatar Hailong Liu Committed by Andrii Nakryiko
Browse files

samples, bpf: Suppress compiler warning 



While cross compiling on ARM32 , the casting from pointer to __u64 will
cause warnings:

samples/bpf/task_fd_query_user.c: In function 'main':
samples/bpf/task_fd_query_user.c:399:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
399 | uprobe_file_offset = (__u64)main - (__u64)&__executable_start;
| ^
samples/bpf/task_fd_query_user.c:399:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
399 | uprobe_file_offset = (__u64)main - (__u64)&__executable_start;

Workaround this by using "unsigned long" to adapt to different ARCHs.

Signed-off-by: default avatarHailong Liu <liu.hailong6@zte.com.cn>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210511140429.89426-1-liuhailongg6@163.com
parent e5670fa0

samples/bpf/task_fd_query_user.c

+1 −1
Original line number Diff line number Diff line
@@ -396,7 +396,7 @@ int main(int argc, char **argv) 
	 * on different systems with different compilers. The right way is

	 * to parse the ELF file. We took a shortcut here.

	 */

	uprobe_file_offset = (__u64)main - (__u64)&__executable_start;

	uprobe_file_offset = (unsigned long)main - (unsigned long)&__executable_start;

	CHECK_AND_RET(test_nondebug_fs_probe("uprobe", (char *)argv[0],

					     uprobe_file_offset, 0x0, false,

					     BPF_FD_TYPE_UPROBE,