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um: Remove unused do_get_thread_area function

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It's not used since it was introduced by commit aa6758d486 ("[PATCH]
uml: implement {get,set}_thread_area for i386"). Now, it's causing a
-Wmissing-prototypes warning:

arch/x86/um/tls_32.c:39:5: warning: no previous prototype for ‘do_get_thread_area’ [-Wmissing-prototypes]
   39 | int do_get_thread_area(struct user_desc *info)
      |     ^~~~~~~~~~~~~~~~~~

The original author also had doubts about whether it should be used.
Considering that 18 years have passed, let's just remove it.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Tiwei Bie 2024-04-23 20:58:58 +08:00 committed by Richard Weinberger
parent 67c3c7de41
commit 470dbef506
1 changed files with 0 additions and 17 deletions
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17
arch/x86/um/tls_32.c
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@ -36,22 +36,6 @@ static int do_set_thread_area(struct user_desc *info)
return ret;
}
int do_get_thread_area(struct user_desc *info)
{
int ret;
u32 cpu;
cpu = get_cpu();
ret = os_get_thread_area(info, userspace_pid[cpu]);
put_cpu();
if (ret)
printk(KERN_ERR "PTRACE_GET_THREAD_AREA failed, err = %d, "
"index = %d\n", ret, info->entry_number);
return ret;
}
/*
* sys_get_thread_area: get a yet unused TLS descriptor index.
* XXX: Consider leaving one free slot for glibc usage at first place. This must
@ -231,7 +215,6 @@ out:
return ret;
}
/* XXX: use do_get_thread_area to read the host value? I'm not at all sure! */
static int get_tls_entry(struct task_struct *task, struct user_desc *info,
int idx)
{