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| author | Dave Airlie <airlied@redhat.com> | 2022-11-24 02:05:43 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2022-11-24 02:05:43 +0100 |
| commit | d47f9580839eb6fe568e38b2084d94887fbf5ce0 (patch) | |
| tree | 2493555057f8e5c850590d7438fdbf4472666201 /kernel/bpf/dispatcher.c | |
| parent | Merge tag 'drm-intel-next-2022-11-18' of git://anongit.freedesktop.org/drm/dr... (diff) | |
| parent | Linux 6.1-rc6 (diff) | |
| download | linux-d47f9580839eb6fe568e38b2084d94887fbf5ce0.tar.xz linux-d47f9580839eb6fe568e38b2084d94887fbf5ce0.zip | |
Backmerge tag 'v6.1-rc6' into drm-next
Linux 6.1-rc6
This is needed for drm-misc-next and tegra.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'kernel/bpf/dispatcher.c')
| -rw-r--r-- | kernel/bpf/dispatcher.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/kernel/bpf/dispatcher.c b/kernel/bpf/dispatcher.c index fa64b80b8bca..c19719f48ce0 100644 --- a/kernel/bpf/dispatcher.c +++ b/kernel/bpf/dispatcher.c @@ -4,6 +4,7 @@ #include <linux/hash.h> #include <linux/bpf.h> #include <linux/filter.h> +#include <linux/static_call.h> /* The BPF dispatcher is a multiway branch code generator. The * dispatcher is a mechanism to avoid the performance penalty of an @@ -104,17 +105,11 @@ static int bpf_dispatcher_prepare(struct bpf_dispatcher *d, void *image, void *b static void bpf_dispatcher_update(struct bpf_dispatcher *d, int prev_num_progs) { - void *old, *new, *tmp; - u32 noff; - int err; - - if (!prev_num_progs) { - old = NULL; - noff = 0; - } else { - old = d->image + d->image_off; + void *new, *tmp; + u32 noff = 0; + + if (prev_num_progs) noff = d->image_off ^ (PAGE_SIZE / 2); - } new = d->num_progs ? d->image + noff : NULL; tmp = d->num_progs ? d->rw_image + noff : NULL; @@ -128,11 +123,10 @@ static void bpf_dispatcher_update(struct bpf_dispatcher *d, int prev_num_progs) return; } - err = bpf_arch_text_poke(d->func, BPF_MOD_JUMP, old, new); - if (err || !new) - return; + __BPF_DISPATCHER_UPDATE(d, new ?: (void *)&bpf_dispatcher_nop_func); - d->image_off = noff; + if (new) + d->image_off = noff; } void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |