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x86/process: Unify copy_thread_tls()

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While looking at the TSS io bitmap it turned out that any change in that
area would require identical changes to copy_thread_tls(). The 32 and 64
bit variants share sufficient code to consolidate them into a common
function to avoid duplication of upcoming modifications.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
This commit is contained in:
Thomas Gleixner
2019-11-11 23:03:16 +01:00
parent 8c40397f22
commit 2fff071d28
5 changed files with 116 additions and 143 deletions
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6
arch/x86/include/asm/ptrace.h
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@@ -361,5 +361,11 @@ extern int do_get_thread_area(struct task_struct *p, int idx,
extern int do_set_thread_area(struct task_struct *p, int idx,
struct user_desc __user *info, int can_allocate);
#ifdef CONFIG_X86_64
# define do_set_thread_area_64(p, s, t) do_arch_prctl_64(p, s, t)
#else
# define do_set_thread_area_64(p, s, t) (0)
#endif
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PTRACE_H */