On 04/12/2015 01:57 PM, Richard Weinberger wrote:
This is v2 of the exec domain removal series I've posted yesterday: https://lkml.org/lkml/2015/4/11/181 I've omitted resending all patches again to lower the churn on LKML. The whole series can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc.git exec_domain_rip_v2 Changes since v1: - Fixed sparc and xtensa thread info offsets Special thanks to Guenter Roeck for reporting and testing! - Fixed an unused variable on arm Thanks to Stephen Rothwell! - Added David Millers ACK Stephen, can you please add the tree to -next? Original description: A long time ago there was the idea to support different ABIs on Linux Such that someone could use for example SCO UNIX binaries on Linux without emulation. While the linux-abi project existed mostly as out-of-tree patch it's core component, execution domains, went mainline. An execution domain allows to specify mappings between different ABIs, these mappings consist of signal, error, socket type, socket options and addess familiy mappings. Mainline has only support for signal mappings. The signal mapping happens in the architecutre specific signal code. Some archs support it, some not, most of them copy&pasted from i386. While the mapping support is incomplete we have two in-kernel users of execution domains. 1. RISC OS personality on ARM. The Kconfig help message states that this feature is very experimental and it is likely that it never worked as expected. Russel is fine with the removal. 2. ia32 support on ia64. This is a left over from: commit 32974ad4907cdde6c9de612cd1b2ee0568fb9409 ([IA64] Remove COMPAT_IA32 support) It registers a dummy Linux/x86 execdomain to make calls to personality(PER_LINUX32) faster as the execution domain core code would try to load a module. As both users can be removed there is no user left and we can remove execution domains support at all from the kernel. The removal will make architecutre specific signal handling easier and there is no need to keep execuction domains as this feature is obviously incomplete and abandoned. Guenter Roeck (1): sparc: Fix execution domain removal Richard Weinberger (25): arm: Remove RISC OS personality ia64: Remove Linux/x86 exec domain support Remove execution domain support arm: Remove signal translation and exec_domain arm64: Remove signal translation and exec_domain blackfin: Autogenerate offsets in struct thread_info blackfin: Remove exec_domain usage frv: Remove signal translation and exec_domain m32r: Autogenerate offsets in struct thread_info m32r: Remove signal translation and exec_domain m68k: Remove signal translation and exec_domain microblaze: Remove signal translation and exec_domain mn10300: Remove signal translation and exec_domain s390: Remove signal translation and exec_domain sh: Remove signal translation and exec_domain sparc: Remove signal translation and exec_domain tile: Remove signal translation and exec_domain um: Remove signal translation and exec_domain unicore32: Remove signal translation and exec_domain x86: Remove signal translation and exec_domain xtensa: Autogenerate offsets in struct thread_info xtensa: Remove signal translation and exec_domain arc: Remove signal translation and exec_domain arch: Remove exec_domain from remaining archs Remove rest of exec domains.
Looking good this time. Build results: total: 121 pass: 121 fail: 0 Qemu test results: total: 30 pass: 30 fail: 0 Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
