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| author |   Andrey Ignatov <rdna@fb.com> | 2019-04-12 16:01:01 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-04-12 16:11:55 -0700 |
| commit | 51356ac89b5a15e5207e8740d5f4f8b71cb7332f (patch) | |
| tree | 2cef71e619ba8695d544481c5253112253c7ef08 /kernel/bpf | |
| parent | Merge branch 'bpf-sysctl-hook' (diff) | |
| download | linux-dev-51356ac89b5a15e5207e8740d5f4f8b71cb7332f.tar.xz linux-dev-51356ac89b5a15e5207e8740d5f4f8b71cb7332f.zip | |
bpf: Fix distinct pointer types warning for ARCH=i386
Fix a new warning reported by kbuild for make ARCH=i386:
In file included from kernel/bpf/cgroup.c:11:0:
kernel/bpf/cgroup.c: In function '__cgroup_bpf_run_filter_sysctl':
include/linux/kernel.h:827:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:841:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:851:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:860:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> kernel/bpf/cgroup.c:837:17: note: in expansion of macro 'min'
ctx.new_len = min(PAGE_SIZE, *pcount);
^~~
Fixes: 4e63acdff864 ("bpf: Introduce bpf_sysctl_{get,set}_new_value helpers")
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/cgroup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c index 789d4ab2336e..e58a6c247f56 100644 --- a/kernel/bpf/cgroup.c +++ b/kernel/bpf/cgroup.c @@ -839,7 +839,7 @@ int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head, * buffer bigger than provided by user. */ ctx.new_val = kmalloc_track_caller(PAGE_SIZE, GFP_KERNEL); - ctx.new_len = min(PAGE_SIZE, *pcount); + ctx.new_len = min_t(size_t, PAGE_SIZE, *pcount); if (!ctx.new_val || copy_from_user(ctx.new_val, buf, ctx.new_len)) /* Let BPF program decide how to proceed. */ |