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Date: Wed, 23 Sep 2009 12:06:36 +0900 From: Hirokazu Takata <takata@...ux-m32r.org> To: torvalds@...ux-foundation.org Cc: linux-m32r@...linux-m32r.org, linux-kernel@...r.kernel.org, Tim Abbott <tabbott@...lice.com>, Sam Ravnborg <sam@...nborg.org>, takata@...ux-m32r.org Subject: Re: [GIT PULL] m32r: Cleanup linker script Hi, Linus, Sorry, there was a cross in the post. I was not conscious of Sam's acknowledgement mail. And a newer patchset has been sent by Tim Abbott on Sep. 22, 2009 - 10:23:21 EST. > [PATCH 00/13] Linker script cleanup patches for various architectures The newer patchset includes updates for not only m32r but also parisc, xtenza, h8300, mn10300 and um. What do I deal with such a cross architectural patchset? -- Takata At Wed, 23 Sep 2009 02:55:19 +0900, Hirokazu Takata wrote: > > Hi Linus, > > This patchset cleans up the linker script for m32r. > > From: Tim Abbott <tabbott@...lice.com> > > This cross-architecture linker script cleanup project is in > preparation for adding support for building the kernel with > -ffunction-sections -fdata-sections, which is a prerequisite for > Ksplice. > > Please pull the following updates. > > --- > The following changes since commit 43c1266ce4dc06bfd236cec31e11e9ecd69c0bef: > Linus Torvalds (1): > Merge branch 'perfcounters-rename-for-linus' of git://git.kernel.org/.../tip/linux-2.6-tip > > are available in the git repository at: > > git://www.linux-m32r.org/git/takata/linux-2.6_dev.git for-linus > > Tim Abbott (6): > m32r: make PAGE_SIZE available to assembly. > m32r: Define THREAD_SIZE only once. > m32r: Move GET_THREAD_INFO definition out of asm/thread_info.h. > m32r: Remove unused .altinstructions and .exit.* code from linker script. > m32r: Move the spi_stack_top and spu_stack_top into .init.data section. > m32r: Cleanup linker script using new linker script macros. > > arch/m32r/include/asm/page.h | 4 +- > arch/m32r/include/asm/processor.h | 2 - > arch/m32r/include/asm/thread_info.h | 15 +------ > arch/m32r/kernel/entry.S | 7 +++ > arch/m32r/kernel/head.S | 4 +- > arch/m32r/kernel/vmlinux.lds.S | 78 ++++------------------------------- > 6 files changed, 23 insertions(+), 87 deletions(-) > > --- > commit 85233c43f7fece10a3ea8ed34f0d546b8dd3a435 > Author: Tim Abbott <tabbott@...lice.com> > Date: Fri Sep 18 16:32:49 2009 -0400 > > m32r: Cleanup linker script using new linker script macros. > > This patch is largely a straightforward conversion. One thing to note > is that the new macros use fewer separate output sections than the old > code; this should have no functional impact but is relevant for people > objdumping vmlinux files. > > Also note that it moves the .data.init_task output sections inside > _edata. > > Signed-off-by: Tim Abbott <tabbott@...lice.com> > Signed-off-by: Hirokazu Takata <takata@...ux-m32r.org> > > commit 743486dff1d03eb4a67bd75402699629f70cd5b4 > Author: Tim Abbott <tabbott@...lice.com> > Date: Fri Sep 18 16:32:48 2009 -0400 > > m32r: Move the spi_stack_top and spu_stack_top into .init.data section. > > Since these get squashed into the .data output section by the m32r > linker script, it seems likely that they don't need their own input > sections. > > At Hirokazu Takata's suggestion, we place these structures in > .init.data rather than just placing them in .data (since they are only > used at init time). > > This patch is preparation for cleaning up the m32r architecture to use > the new macros in vmlinux.lds.h; if these sections are indeed not > needed, then we can use the RW_DATA_SECTION macro for m32r and save a > bunch of redundant code. > > Signed-off-by: Tim Abbott <tabbott@...lice.com> > Signed-off-by: Hirokazu Takata <takata@...ux-m32r.org> > > commit 2a67d26284c31e676bcf3891ad8cee75e87fbada > Author: Tim Abbott <tabbott@...lice.com> > Date: Fri Sep 18 16:32:47 2009 -0400 > > m32r: Remove unused .altinstructions and .exit.* code from linker script. > > It appears that m32r copied the .altinstructions definition from x86 > when the architecture was first merged into Linux. m32r doesn't put > anything in .altinstructions, so this is just dead code. > > The following block affecting .exit.text/.exit.data, which has a > comment also copied from x86, should also be deleted; the linker > script later discards the .exit.text and .exit.data sections. > > Signed-off-by: Tim Abbott <tabbott@...lice.com> > Signed-off-by: Hirokazu Takata <takata@...ux-m32r.org> > > commit 00b01b246bc2e28763cbd85f0dc949d6c0d38c13 > Author: Tim Abbott <tabbott@...lice.com> > Date: Fri Sep 18 16:32:46 2009 -0400 > > m32r: Move GET_THREAD_INFO definition out of asm/thread_info.h. > > Previously, asm/thread_info.h was not usable from linker scripts > because it contains a piece of .macro code. Since that code was only > used in the m32r entry.S, the right fix is probably to move the macro > there. > > Signed-off-by: Tim Abbott <tabbott@...lice.com> > Signed-off-by: Hirokazu Takata <takata@...ux-m32r.org> > > commit a7efb879ab5b07726873ace8305373bdf68be8a8 > Author: Tim Abbott <tabbott@...lice.com> > Date: Fri Sep 18 16:32:45 2009 -0400 > > m32r: Define THREAD_SIZE only once. > > Previously, m32r's asm/thread_info.h defined THREAD_SIZE differently > for assembly and C code; now that PAGE_SIZE is usable from assembly, > these can be combined. Also, m32r's asm/processor.h redefines > THREAD_SIZE to the same value; remove this redundant definition. > > Signed-off-by: Tim Abbott <tabbott@...lice.com> > Signed-off-by: Hirokazu Takata <takata@...ux-m32r.org> > > commit 8b1c9befbfbd443bd95e77db01c70f1741aa2511 > Author: Tim Abbott <tabbott@...lice.com> > Date: Fri Sep 18 16:32:44 2009 -0400 > > m32r: make PAGE_SIZE available to assembly. > > page.h includes ifndef __ASSEMBLY__ guards, but PAGE_SIZE is defined > using "1UL", which the assembler does not support. Use the _AC macro > from const.h to make it available to assembly (and linker scripts). > > Signed-off-by: Tim Abbott <tabbott@...lice.com> > Signed-off-by: Hirokazu Takata <takata@...ux-m32r.org> > > -- > Hirokazu Takata <takata@...ux-m32r.org> > Linux/M32R Project: http://www.linux-m32r.org/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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