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| author | Peter Zijlstra <peterz@infradead.org> | 2022-11-03 13:00:13 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-11-04 23:13:08 +0100 |
| commit | 18acb7fac22ff7b36c7ea5a76b12996e7b7dbaba (patch) | |
| tree | 3d92ec10bc05591bd361799acd412e7903365a9b /kernel/bpf/dispatcher.c | |
| parent | d3fd203f36d46aa29600a72d57a1b61af80e4a25 (diff) | |
| download | linux-18acb7fac22ff7b36c7ea5a76b12996e7b7dbaba.tar.bz2 | |
bpf: Revert ("Fix dispatcher patchable function entry to 5 bytes nop")
Because __attribute__((patchable_function_entry)) is only available
since GCC-8 this solution fails to build on the minimum required GCC
version.
Undo these changes so we might try again -- without cluttering up the
patches with too many changes.
This is an almost complete revert of:
dbe69b299884 ("bpf: Fix dispatcher patchable function entry to 5 bytes nop")
ceea991a019c ("bpf: Move bpf_dispatcher function out of ftrace locations")
(notably the arch/x86/Kconfig hunk is kept).
Reported-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Björn Töpel <bjorn@kernel.org>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Björn Töpel <bjorn@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lkml.kernel.org/r/439d8dc735bb4858875377df67f1b29a@AcuMS.aculab.com
Link: https://lore.kernel.org/bpf/20221103120647.728830733@infradead.org
Diffstat (limited to 'kernel/bpf/dispatcher.c')
| -rw-r--r-- | kernel/bpf/dispatcher.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/kernel/bpf/dispatcher.c b/kernel/bpf/dispatcher.c index 04f0a045dcaa..fa64b80b8bca 100644 --- a/kernel/bpf/dispatcher.c +++ b/kernel/bpf/dispatcher.c @@ -4,7 +4,6 @@ #include <linux/hash.h> #include <linux/bpf.h> #include <linux/filter.h> -#include <linux/init.h> /* The BPF dispatcher is a multiway branch code generator. The * dispatcher is a mechanism to avoid the performance penalty of an @@ -91,11 +90,6 @@ int __weak arch_prepare_bpf_dispatcher(void *image, void *buf, s64 *funcs, int n return -ENOTSUPP; } -int __weak __init bpf_arch_init_dispatcher_early(void *ip) -{ - return -ENOTSUPP; -} - static int bpf_dispatcher_prepare(struct bpf_dispatcher *d, void *image, void *buf) { s64 ips[BPF_DISPATCHER_MAX] = {}, *ipsp = &ips[0]; |