s390/compat: automatic zero, sign and pointer conversion of syscalls

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Instead of explicitly changing compat system call parameters from e.g.
unsigned long to compat_ulong_t let the COMPAT_SYSCALL_WRAP macros
automatically detect (unsigned) long parameters and zero and sign
extend them automatically.
The resulting binary is completely identical.

In addition add a sys_[system call name] prototype for each system call
wrapper. This will cause compile errors if the prototype does not match
the prototype in include/linux/syscall.h.
Therefore we should now always get the correct zero and sign extension
of system call parameters. Pointers are handled like before.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

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This commit is contained in:

Heiko Carstens 2014-03-01 13:45:03 +01:00

parent 2c81fc4fb4

commit ab4f8bba19

2 changed files with 77 additions and 59 deletions

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134

arch/s390/kernel/compat_wrap.c

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2

include/linux/syscalls.h

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