linux-kernel - Re: [PATCH v9 01/17] h8300: Assembly headers.

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Date:	Tue, 28 Apr 2015 20:19:52 +0900
From:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
To:	Tobias Klauser <tklauser@...tanz.ch>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH v9 01/17] h8300: Assembly headers.

At Mon, 27 Apr 2015 09:42:41 +0200,
Tobias Klauser wrote:
> 
> On 2015-04-27 at 07:35:08 +0200, Yoshinori Sato <ysato@...rs.sourceforge.jp> wrote:
> [...]
> > diff --git a/arch/h8300/include/asm/elf.h b/arch/h8300/include/asm/elf.h
> > new file mode 100644
> > index 0000000..09031d0
> > --- /dev/null
> > +++ b/arch/h8300/include/asm/elf.h
> > @@ -0,0 +1,101 @@
> > +#ifndef __ASM_H8300_ELF_H
> > +#define __ASM_H8300_ELF_H
> > +
> > +/*
> > + * ELF register definitions..
> > + */
> > +
> > +#include <asm/ptrace.h>
> > +#include <asm/user.h>
> > +
> > +typedef unsigned long elf_greg_t;
> > +
> > +#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
> > +typedef elf_greg_t elf_gregset_t[ELF_NGREG];
> > +typedef unsigned long elf_fpregset_t;
> > +
> > +/*
> > + * This is used to ensure we don't load something for the wrong architecture.
> > + */
> > +#define elf_check_arch(x) ((x)->e_machine == EM_H8_300)
> 
> EM_H8_300 is still used before it is introduced in patch 15/17, please
> change the patch order. Otherwise you break bisectability.

Oh. sorry.
I forgat change order.

> [...]
> > diff --git a/arch/h8300/include/asm/pgtable.h b/arch/h8300/include/asm/pgtable.h
> > new file mode 100644
> > index 0000000..8341db6
> > --- /dev/null
> > +++ b/arch/h8300/include/asm/pgtable.h
> > @@ -0,0 +1,49 @@
> > +#ifndef _H8300_PGTABLE_H
> > +#define _H8300_PGTABLE_H
> > +#include <asm-generic/pgtable-nopud.h>
> > +#include <asm-generic/pgtable.h>
> > +#define pgtable_cache_init()   do { } while (0)
> > +extern void paging_init(void);
> > +#define PAGE_NONE		__pgprot(0)    /* these mean nothing to NO_MM */
> > +#define PAGE_SHARED		__pgprot(0)    /* these mean nothing to NO_MM */
> > +#define PAGE_COPY		__pgprot(0)    /* these mean nothing to NO_MM */
> > +#define PAGE_READONLY	__pgprot(0)    /* these mean nothing to NO_MM */
> > +#define PAGE_KERNEL		__pgprot(0)    /* these mean nothing to NO_MM */
> > +#define __swp_type(x)		(0)
> > +#define __swp_offset(x)		(0)
> > +#define __swp_entry(typ, off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
> > +#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
> > +#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
> > +#define kern_addr_valid(addr)	(1)
> > +#define pgprot_writecombine(prot)  (prot)
> > +#define pgprot_noncached pgprot_writecombine
> > +
> > +static inline int pte_file(pte_t pte) { return 0; }
> 
> No need to define pte_file() anymore. Please see my review comments for
> v8.

OK.

> 
> > +#define swapper_pg_dir ((pgd_t *) 0)
> > +/*
> > + * ZERO_PAGE is a global shared page that is always zero: used
> > + * for zero-mapped memory areas etc..
> > + */
> > +#define ZERO_PAGE(vaddr)	(virt_to_page(0))
> > +
> > +/*
> > + * These would be in other places but having them here reduces the diffs.
> > + */
> > +extern unsigned int kobjsize(const void *objp);
> > +extern int is_in_rom(unsigned long);
> 
> These aren't needed as well, as mentioned in my earlier review comments.

OK.
Thanks.

-- 
Yoshinori Sato
<ysato@...rs.sourceforge.jp>
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