Re: [uml-devel] [UML patch] fixes for !CONFIG_PROC_MM, 2.6.0

["roland" <for_spam@gmx.de>]

hi!
i need the following additional patch (see below) to sucessfully compile uml on a suse9 box.
another candidate for your patchset, ingo? 
(or should we blame gcc 3.1.1 ?)

regards
roland


>with mode=tt the kernel runs. Then i tried another kernel from
>kernels.usermodelinux.org:
>linux-2.4.23-rc3-djc3-6um (nomods)
>and: it works.
>I talked to david and he said the kernel builds without problems
>which is not the case on my host. I get this error:
>bugs.c: In function `disable_lcall':
>bugs.c:111: error: storage size of `ldt' isn't known
>bugs.c:118: warning: implicit declaration of function `modify_ldt'
>bugs.c:111: warning: unused variable `ldt'
>
>which is fixed with a patch from:
>http://people.0x63.nu/~andersg/uml-minor-fixes.diff
>
>so, for now, i don't have more ideas to solve this Problem. If someone
>of you has an idea or fix, please commit ;)



----- Original Message ----- 
From: "Ingo Molnar" <mingo@elte.hu>
To: "UML devel list" <user-mode-linux-devel@lists.sourceforge.net>
Cc: "Jeff Dike" <jdike@addtoit.com>
Sent: Thursday, December 18, 2003 3:24 PM
Subject: [uml-devel] [UML patch] fixes for !CONFIG_PROC_MM, 2.6.0


> 
> the attached patch makes the combo 2.6.0 patch compile for the
> !CONFIG_PROC_MM case. (necessary if forcing TT mode by disabling skas.)
> 
> This is also a small cleanup as it moves the architecture-independent
> ptrace functions into the generic kernel/ptrace.c file.
> 
> i've also uploaded a new combo patch with the alignment fix plus these
> changes included:
> 
>     redhat.com/~mingo/UML-patches/uml-combo-2.6.0-A2
> 
> Ingo
> 
> --- linux/arch/i386/kernel/ptrace.c.orig 
> +++ linux/arch/i386/kernel/ptrace.c 
> @@ -521,12 +521,6 @@ asmlinkage int sys_ptrace(long request, 
>   break;
>   }
>  
> - case PTRACE_SIGPENDING:
> - ret = copy_to_user((unsigned long *) data, 
> -    &child->pending.signal,
> -    sizeof(child->pending.signal));
> - break;
> -
>   case PTRACE_LDT: {
>   struct ptrace_ldt ldt;
>  
> @@ -539,23 +533,6 @@ asmlinkage int sys_ptrace(long request, 
>   break;
>   }
>  
> - case PTRACE_SWITCH_MM: {
> - struct mm_struct *old = child->mm;
> - struct mm_struct *new = proc_mm_get_mm(data);
> -
> - if(IS_ERR(new)){
> - ret = PTR_ERR(new);
> - break;
> - }
> -
> - atomic_inc(&new->mm_users);
> - child->mm = new;
> - child->active_mm = new;
> - mmput(old);
> - ret = 0;
> - break;
> - }
> -
>   default:
>   ret = ptrace_request(child, request, addr, data);
>   break;
> --- linux/kernel/ptrace.c.orig 
> +++ linux/kernel/ptrace.c 
> @@ -316,6 +316,32 @@ int ptrace_request(struct task_struct *c
>   case PTRACE_SETSIGINFO:
>   ret = ptrace_setsiginfo(child, (siginfo_t __user *) data);
>   break;
> + case PTRACE_SIGPENDING:
> + ret = copy_to_user((unsigned long *) data, 
> +    &child->pending.signal,
> +    sizeof(child->pending.signal));
> + break;
> +
> +#ifdef CONFIG_PROC_MM
> + case PTRACE_SWITCH_MM:
> + {
> + struct mm_struct *old = child->mm;
> + struct mm_struct *new = proc_mm_get_mm(data);
> +
> + if (IS_ERR(new)) {
> + ret = PTR_ERR(new);
> + break;
> + }
> +
> + atomic_inc(&new->mm_users);
> + child->mm = new;
> + child->active_mm = new;
> + mmput(old);
> + ret = 0;
> + break;
> + }
> +#endif
> +
>   default:
>   break;
>   }
> 
> 
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