(backport <rust-lang#4498>)
(cherry picked from commit 82d508f)

(backport <rust-lang#4498>)
(cherry picked from commit c5ddc70)

(backport <rust-lang#4498>)
(cherry picked from commit 483e331)

Our `style.sh` script can't handle these easily, and it seems like
`ctest` may struggle with this macro. Add the `enum` keyword so the
expanded code is valid Rust.

(backport <rust-lang#4494>)
(cherry picked from commit 19e04c8)

(backport <rust-lang#4502>)
(cherry picked from commit cbcd344)

(backport <rust-lang#4482>)
(cherry picked from commit 8443057)

(backport <rust-lang#4482>)
(cherry picked from commit 7d2a695)

(backport <rust-lang#4482>)
(cherry picked from commit 34e3b14)

(backport <rust-lang#4482>)
(cherry picked from commit 9220aac)

…older

(backport <rust-lang#4482>)
(cherry picked from commit db4dba7)

(backport <rust-lang#4507>)
(cherry picked from commit fa6a299)

musl defines nlink_t to be an unsigned 32-bit integer on mips64,
therefore changing the size of stat64 from 216 bytes to 208.

The current definition in the libc crate does not match this and
therefore defines stat64 wrong on mips64 musl, which results in bogus
readings of fields following st_nlink.

See
https://git.musl-libc.org/cgit/musl/tree/arch/mips64/bits/alltypes.h.in#n22
for the musl definition of nlink_t.

Signed-off-by: Jens Reidel <[email protected]>

(backport <rust-lang#4509>)
(cherry picked from commit 02eff0f)

musl has its own definition of the fanotify_event_metadata
struct and doesn't use the one from the Linux kernel.

The difference here is that musl's mask field has the type
unsigned long long, while the kernel uses __u64.

This currently causes libc-test to fail to compile on musl targets.

Linux: https://github.com/torvalds/linux/blob/master/include/uapi/linux/fanotify.h#L143
musl: https://git.musl-libc.org/cgit/musl/tree/include/sys/fanotify.h#n15

Signed-off-by: Jens Reidel <[email protected]>

(backport <rust-lang#4510>)
(cherry picked from commit 7559ba1)

The Linux kernel only defines MAP_32BIT in the asm/mman.h header
on x86. Remove the erraneous definitions for any other architectures
on Linux targets.

See https://github.com/torvalds/linux/blob/master/arch/x86/include/uapi/asm/mman.h#L5

This makes libc-test somewhat compile on powerpc64le musl.

Signed-off-by: Jens Reidel <[email protected]>

(backport <rust-lang#4511>)
(cherry picked from commit 9332d56)

(backport <rust-lang#4503>)
(cherry picked from commit 64bfc7d)

See: https://github.com/torvalds/linux/blob/master/include/uapi/linux/securebits.h

(backport <rust-lang#4480>)
(cherry picked from commit f811577)

Since 1.80 these, along with their `_val` versions, are in the default
`core` prelude so they don't need to be imported. 1.80 exceeds our MSRV
so we can't use it from there, but we can add it to our prelude for now.

(backport <rust-lang#4532>)
(cherry picked from commit 26a5ea6)

`cargo fmt` was being called twice without `--check`, so style was only
enforced on files that got checked individually. Remove the redundant
call and add `--check` here.

(backport <rust-lang#4533>)
(cherry picked from commit 1187328)

(backport <rust-lang#4533>)
(cherry picked from commit 5b14b89)

(backport <rust-lang#4535>)
(cherry picked from commit ae97728)

A recent change has replaced an unused preprocessor symbol: P_UNUSED3

freebsd/freebsd-src@33be163

Another recent change has changed the size of a spare field: mc_spare

freebsd/freebsd-src@eea3e4d

(backport <rust-lang#4488>)
(cherry picked from commit 46b90a8)