4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 116bfa96a255123ed209da6544f74a4f2eaca5da ]
Compiling with W=1 generates warnings:
CC kernel/bpf/core.o kernel/bpf/core.c:721:12: warning: no previous prototype for ?bpf_jit_alloc_exec_limit? [-Wmissing-prototypes] 721 | u64 __weak bpf_jit_alloc_exec_limit(void) | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/core.c:757:14: warning: no previous prototype for ?bpf_jit_alloc_exec? [-Wmissing-prototypes] 757 | void *__weak bpf_jit_alloc_exec(unsigned long size) | ^~~~~~~~~~~~~~~~~~ kernel/bpf/core.c:762:13: warning: no previous prototype for ?bpf_jit_free_exec? [-Wmissing-prototypes] 762 | void __weak bpf_jit_free_exec(void *addr) | ^~~~~~~~~~~~~~~~~
All three are weak functions that archs can override, provide proper prototypes for when a new arch provides their own.
Signed-off-by: Valdis Kletnieks valdis.kletnieks@vt.edu Acked-by: Song Liu songliubraving@fb.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/filter.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/filter.h b/include/linux/filter.h index 1a39d57eb88f..037610845892 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -844,7 +844,9 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr, unsigned int alignment, bpf_jit_fill_hole_t bpf_fill_ill_insns); void bpf_jit_binary_free(struct bpf_binary_header *hdr); - +u64 bpf_jit_alloc_exec_limit(void); +void *bpf_jit_alloc_exec(unsigned long size); +void bpf_jit_free_exec(void *addr); void bpf_jit_free(struct bpf_prog *fp);
struct bpf_prog *bpf_jit_blind_constants(struct bpf_prog *fp);