diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-09-03 16:22:40 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-09-08 22:21:36 -0400 |
| commit | 47058bb54b57962b3958a936ddbc59355e4c5504 (patch) | |
| tree | b1399d96916177ef63b8a86bf30daceb35508959 /arch/x86/include/asm/processor.h | |
| parent | a1d826d475aafe63775b910e86ccd1bcf1e5a6e1 (diff) | |
x86: remove address space overrides using set_fs()
Stop providing the possibility to override the address space using
set_fs() now that there is no need for that any more. To properly
handle the TASK_SIZE_MAX checking for 4 vs 5-level page tables on
x86 a new alternative is introduced, which just like the one in
entry_64.S has to use the hardcoded virtual address bits to escape
the fact that TASK_SIZE_MAX isn't actually a constant when 5-level
page tables are enabled.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 1618eeb08361..189573d95c3a 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -482,10 +482,6 @@ extern unsigned int fpu_user_xstate_size; struct perf_event; -typedef struct { - unsigned long seg; -} mm_segment_t; - struct thread_struct { /* Cached TLS descriptors: */ struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; @@ -538,8 +534,6 @@ struct thread_struct { */ unsigned long iopl_emul; - mm_segment_t addr_limit; - unsigned int sig_on_uaccess_err:1; /* Floating point and extended processor state */ @@ -785,15 +779,12 @@ static inline void spin_lock_prefetch(const void *x) #define INIT_THREAD { \ .sp0 = TOP_OF_INIT_STACK, \ .sysenter_cs = __KERNEL_CS, \ - .addr_limit = KERNEL_DS, \ } #define KSTK_ESP(task) (task_pt_regs(task)->sp) #else -#define INIT_THREAD { \ - .addr_limit = KERNEL_DS, \ -} +#define INIT_THREAD { } extern unsigned long KSTK_ESP(struct task_struct *task); |