Re: [PATCH v2 15/18] sparc64: remove CONFIG_SET_FS support
From: Sam Ravnborg <hidden>
Date: 2022-02-16 18:35:22
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linux-alpha, linux-api, linux-arch, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-s390, linux-um, linuxppc-dev, lkml, sparclinux
Hi Arnd. On Wed, Feb 16, 2022 at 02:13:29PM +0100, Arnd Bergmann wrote:
From: Arnd Bergmann <arnd@arndb.de> sparc64 uses address space identifiers to differentiate between kernel and user space, using ASI_P for kernel threads but ASI_AIUS for normal user space, with the option of changing between them. As nothing really changes the ASI any more, just hardcode ASI_AIUS everywhere. Kernel threads are not allowed to access __user pointers anyway. Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- arch/sparc/include/asm/processor_64.h | 4 ---- arch/sparc/include/asm/switch_to_64.h | 4 +--- arch/sparc/include/asm/thread_info_64.h | 4 +--- arch/sparc/include/asm/uaccess_64.h | 20 +------------------- arch/sparc/kernel/process_64.c | 12 ------------ arch/sparc/kernel/traps_64.c | 2 -- arch/sparc/lib/NGmemcpy.S | 3 +-- arch/sparc/mm/init_64.c | 7 ++++--- 8 files changed, 8 insertions(+), 48 deletions(-)
I think you somehow missed the Kconfig change, and also the related sparc32 change which continue to have set_fs() after this patch. I did not manage to review the patch - as I am too unfamiliar with the code paths and the set_fs() removal changes. Sam