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compat: consolidate the compat_flock{,64} definition

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Provide a single common definition for the compat_flock and
compat_flock64 structures using the same tricks as for the native
variants.  Another extra define is added for the packing required on
x86.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Helge Deller <deller@gmx.de>  # parisc
Link: https://lore.kernel.org/r/20220405071314.3225832-4-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Christoph Hellwig
2022-04-05 15:12:57 +08:00
committed by Palmer Dabbelt
parent 306f7cc1e9
commit 3ce0f2373f
8 changed files with 37 additions and 115 deletions
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31
include/linux/compat.h
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@@ -258,6 +258,37 @@ struct compat_rlimit {
compat_ulong_t rlim_max;
};
#ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED
#define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed))
#else
#define __ARCH_COMPAT_FLOCK64_PACK
#endif
struct compat_flock {
short l_type;
short l_whence;
compat_off_t l_start;
compat_off_t l_len;
#ifdef __ARCH_COMPAT_FLOCK_EXTRA_SYSID
__ARCH_COMPAT_FLOCK_EXTRA_SYSID
#endif
compat_pid_t l_pid;
#ifdef __ARCH_COMPAT_FLOCK_PAD
__ARCH_COMPAT_FLOCK_PAD
#endif
};
struct compat_flock64 {
short l_type;
short l_whence;
compat_loff_t l_start;
compat_loff_t l_len;
compat_pid_t l_pid;
#ifdef __ARCH_COMPAT_FLOCK64_PAD
__ARCH_COMPAT_FLOCK64_PAD
#endif
} __ARCH_COMPAT_FLOCK64_PACK;
struct compat_rusage {
struct old_timeval32 ru_utime;
struct old_timeval32 ru_stime;