user/sven/linux.git/arch/s390/kernel/compat_linux.c, branch v5.7

s390: use generic UID16 implementation

2019-01-18T08:33:18Z

s390 has an almost identical copy of the code in kernel/uid16.c. The problem here is that it requires calling the regular system calls, which the generic implementation handles correctly, but the internal interfaces are not declared in a global header for this. The best way forward here seems to be to just use the generic code and delete the s390 specific implementation. I keep the changes to uapi/asm/posix_types.h inside of an #ifdef check so user space does not observe any changes. As some of the system calls pass pointers, we also need wrappers in compat_wrapper.c, which I add for all calls with at least one argument. All those wrappers can be removed in a later step. Link: https://lore.kernel.org/lkml/20190116131527.2071570-4-arnd@arndb.de Signed-off-by: Arnd Bergmann Reviewed-by: Heiko Carstens Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

ipc: introduce ksys_ipc()/compat_ksys_ipc() for s390

2019-01-18T08:33:18Z

The sys_ipc() and compat_ksys_ipc() functions are meant to only be used from the system call table, not called by another function. Introduce ksys_*() interfaces for this purpose, as we have done for many other system calls. Link: https://lore.kernel.org/lkml/20190116131527.2071570-3-arnd@arndb.de Signed-off-by: Arnd Bergmann Reviewed-by: Heiko Carstens [heiko.carstens@de.ibm.com: compile fix for !CONFIG_COMPAT] Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead()

2018-04-02T18:16:12Z

Using this helper allows us to avoid the in-kernel calls to the sys_readahead() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_readahead(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Andrew Morton Cc: linux-mm@kvack.org Signed-off-by: Dominik Brodowski

mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff()

2018-04-02T18:16:11Z

Using this helper allows us to avoid the in-kernel calls to the sys_mmap_pgoff() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_mmap_pgoff(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Andrew Morton Cc: linux-mm@kvack.org Signed-off-by: Dominik Brodowski

mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64()

2018-04-02T18:16:10Z

Using the ksys_fadvise64_64() helper allows us to avoid the in-kernel calls to the sys_fadvise64_64() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as ksys_fadvise64_64(). Some compat stubs called sys_fadvise64(), which then just passed through the arguments to sys_fadvise64_64(). Get rid of this indirection, and call ksys_fadvise64_64() directly. This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Andrew Morton Cc: linux-mm@kvack.org Signed-off-by: Dominik Brodowski

fs: add ksys_fallocate() wrapper; remove in-kernel calls to sys_fallocate()

2018-04-02T18:16:09Z

Using the ksys_fallocate() wrapper allows us to get rid of in-kernel calls to the sys_fallocate() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_fallocate(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro Cc: Andrew Morton Signed-off-by: Dominik Brodowski

fs: add ksys_p{read,write}64() helpers; remove in-kernel calls to syscalls

2018-04-02T18:16:09Z

Using the ksys_p{read,write}64() wrappers allows us to get rid of in-kernel calls to the sys_pread64() and sys_pwrite64() syscalls. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_p{read,write}64(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro Cc: Andrew Morton Signed-off-by: Dominik Brodowski

fs: add ksys_truncate() wrapper; remove in-kernel calls to sys_truncate()

2018-04-02T18:16:08Z

Using the ksys_truncate() wrapper allows us to get rid of in-kernel calls to the sys_truncate() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_truncate(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro Cc: Andrew Morton Signed-off-by: Dominik Brodowski

fs: add ksys_sync_file_range helper(); remove in-kernel calls to syscall

2018-04-02T18:16:07Z

Using this helper allows us to avoid the in-kernel calls to the sys_sync_file_range() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_sync_file_range(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro Cc: Andrew Morton Signed-off-by: Dominik Brodowski

fs: add ksys_read() helper; remove in-kernel calls to sys_read()

2018-04-02T18:16:04Z

Using this helper allows us to avoid the in-kernel calls to the sys_read() syscall. The ksys_ prefix denotes that this function is meant as a drop-in replacement for the syscall. In particular, it uses the same calling convention as sys_read(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Alexander Viro Signed-off-by: Dominik Brodowski