On Tue, May 4, 2021 at 4:05 AM Alejandro Colomar <alx.manpages@xxxxxxxxx> wrote: > > Some manual pages are already using C99 syntax for integral > types 'uint32_t', but some aren't. There are some using kernel > syntax '__u32'. Fix those. > > Some pages also document attributes, using GNU syntax > '__attribute__((xxx))'. Update those to use the shorter and more > portable C11 keywords such as 'alignas()' when possible, and C2x > syntax '[[gnu::xxx]]' elsewhere, which hasn't been standardized > yet, but is already implemented in GCC, and available through > either --std=c2x or any of the --std=gnu... options. > > The standard isn't very clear on how to use alignas() or > [[]]-style attributes, so the following link is useful in the case > of 'alignas()' and '[[gnu::aligned()]]': > <https://stackoverflow.com/q/67271825/6872717> > > Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx> > Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx> > Cc: glibc <libc-alpha@xxxxxxxxxxxxxx> > Cc: GCC <gcc-patches@xxxxxxxxxxx> > Cc: Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> > Cc: bpf <bpf@xxxxxxxxxxxxxxx> > Cc: David Laight <David.Laight@xxxxxxxxxx> > Cc: Zack Weinberg <zackw@xxxxxxxxx> > Cc: Joseph Myers <joseph@xxxxxxxxxxxxxxxx> > --- > man2/bpf.2 | 49 ++++++++++++++++++++++++------------------------- > 1 file changed, 24 insertions(+), 25 deletions(-) > > diff --git a/man2/bpf.2 b/man2/bpf.2 > index 6e1ffa198..04b8fbcef 100644 > --- a/man2/bpf.2 > +++ b/man2/bpf.2 > @@ -186,41 +186,40 @@ commands: > .PP > .in +4n > .EX > -union bpf_attr { > +union [[gnu::aligned(8)]] bpf_attr { > struct { /* Used by BPF_MAP_CREATE */ > - __u32 map_type; > - __u32 key_size; /* size of key in bytes */ > - __u32 value_size; /* size of value in bytes */ > - __u32 max_entries; /* maximum number of entries > - in a map */ > + uint32_t map_type; > + uint32_t key_size; /* size of key in bytes */ > + uint32_t value_size; /* size of value in bytes */ > + uint32_t max_entries; /* maximum number of entries > + in a map */ For the same reasons as explained earlier: Nacked-by: Alexei Starovoitov <ast@xxxxxxxxxx>
