From 967747bbc084b93b54e66f9047d342232314cd25 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 11 Feb 2022 21:42:45 +0100 Subject: uaccess: remove CONFIG_SET_FS There are no remaining callers of set_fs(), so CONFIG_SET_FS can be removed globally, along with the thread_info field and any references to it. This turns access_ok() into a cheaper check against TASK_SIZE_MAX. As CONFIG_SET_FS is now gone, drop all remaining references to set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel(). Acked-by: Sam Ravnborg # for sparc32 changes Acked-by: "Eric W. Biederman" Tested-by: Sergey Matyukevich # for arc changes Acked-by: Stafford Horne # [openrisc, asm-generic] Acked-by: Dinh Nguyen Signed-off-by: Arnd Bergmann --- arch/hexagon/Kconfig | 1 - arch/hexagon/include/asm/thread_info.h | 6 ------ arch/hexagon/kernel/process.c | 1 - 3 files changed, 8 deletions(-) (limited to 'arch/hexagon') diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 15dd8f38b698..54eadf265178 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -30,7 +30,6 @@ config HEXAGON select GENERIC_CLOCKEVENTS_BROADCAST select MODULES_USE_ELF_RELA select GENERIC_CPU_DEVICES - select SET_FS select ARCH_WANT_LD_ORPHAN_WARN select TRACE_IRQFLAGS_SUPPORT help diff --git a/arch/hexagon/include/asm/thread_info.h b/arch/hexagon/include/asm/thread_info.h index 535976665bf0..e90f280b9ce3 100644 --- a/arch/hexagon/include/asm/thread_info.h +++ b/arch/hexagon/include/asm/thread_info.h @@ -22,10 +22,6 @@ #ifndef __ASSEMBLY__ -typedef struct { - unsigned long seg; -} mm_segment_t; - /* * This is union'd with the "bottom" of the kernel stack. * It keeps track of thread info which is handy for routines @@ -37,7 +33,6 @@ struct thread_info { unsigned long flags; /* low level flags */ __u32 cpu; /* current cpu */ int preempt_count; /* 0=>preemptible,<0=>BUG */ - mm_segment_t addr_limit; /* segmentation sux */ /* * used for syscalls somehow; * seems to have a function pointer and four arguments @@ -66,7 +61,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = 1, \ - .addr_limit = KERNEL_DS, \ .sp = 0, \ .regs = NULL, \ } diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c index 232dfd8956aa..dfa6b2757c05 100644 --- a/arch/hexagon/kernel/process.c +++ b/arch/hexagon/kernel/process.c @@ -105,7 +105,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, /* * Parent sees new pid -- not necessary, not even possible at * this point in the fork process - * Might also want to set things like ti->addr_limit */ return 0; -- cgit v1.2.3-70-g09d2