linux-kernel - Re: linux-next: duplicate patches in the risc-v tree

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Date:   Mon, 30 Oct 2023 11:15:48 -0700 (PDT)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
CC:     Paul Walmsley <paul@...an.com>, linux-kernel@...r.kernel.org,
        linux-next@...r.kernel.org
Subject:     Re: linux-next: duplicate patches in the risc-v tree

On Sun, 29 Oct 2023 13:56:29 PDT (-0700), Stephen Rothwell wrote:
> Hi all,
>
> The following commits are also in Linus Torvalds' tree as different
> commits (but the same patches):
>
>   767423658d53 ("riscv: kexec: Align the kexeced kernel entry")
>   fe2ed36d419f ("riscv: Remove duplicate objcopy flag")

Sorry, but I'm lost here -- I'm not sure if I've managed to screw up git 
again?  If it helps, I'm not seeing the same commits here:

    $ git show fe2ed36d419f
    commit fe2ed36d419fdae48a6850bdbe2d2e7543c3c389
    gpg: Signature made Wed 20 Sep 2023 02:51:59 AM PDT
    gpg:                using RSA key 2B3C3747446843B24A943A7A2E1319F35FBB1889
    gpg:                issuer "palmer@...belt.com"
    gpg: Good signature from "Palmer Dabbelt <palmer@...belt.com>" [ultimate]
    gpg:                 aka "Palmer Dabbelt <palmer@...osinc.com>" [ultimate]
    Author: Song Shuai <songshuaishuai@...ylab.org>
    Date:   Thu Sep 14 17:13:34 2023 +0800
    
        riscv: Remove duplicate objcopy flag
    
        There are two duplicate `-O binary` flags when objcopying from vmlinux
        to Image/xipImage.
    
        RISC-V set `-O binary` flag in both OBJCOPYFLAGS in the top-level riscv
        Makefile and OBJCOPYFLAGS_* in the boot/Makefile, and the objcopy cmd
        in Kbuild would join them together.
    
        The `-O binary` flag is only needed for objcopying Image, so remove the
        OBJCOPYFLAGS in the top-level riscv Makefile.
    
        Fixes: c0fbcd991860 ("RISC-V: Build flat and compressed kernel images")
        Signed-off-by: Song Shuai <songshuaishuai@...ylab.org>
        Link: https://lore.kernel.org/r/20230914091334.1458542-1-songshuaishuai@tinylab.org
        Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
    
    diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
    index 1329e060c548..b43a6bb7e4dc 100644
    --- a/arch/riscv/Makefile
    +++ b/arch/riscv/Makefile
    @@ -6,7 +6,6 @@
     # for more details.
     #
    
    -OBJCOPYFLAGS    := -O binary
     LDFLAGS_vmlinux := -z norelro
     ifeq ($(CONFIG_RELOCATABLE),y)
     	LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs

and

    $ git show 767423658d53 | cat
    commit 767423658d53d147409821e51e6d0bc12425b24f
    gpg: Signature made Wed 20 Sep 2023 02:53:30 AM PDT
    gpg:                using RSA key 2B3C3747446843B24A943A7A2E1319F35FBB1889
    gpg:                issuer "palmer@...belt.com"
    gpg: Good signature from "Palmer Dabbelt <palmer@...belt.com>" [ultimate]
    gpg:                 aka "Palmer Dabbelt <palmer@...osinc.com>" [ultimate]
    Author: Song Shuai <songshuaishuai@...ylab.org>
    Date:   Thu Sep 7 18:33:03 2023 +0800
    
        riscv: kexec: Align the kexeced kernel entry
    
        The current riscv boot protocol requires 2MB alignment for RV64
        and 4MB alignment for RV32.
    
        In KEXEC_FILE path, the elf_find_pbase() function should align
        the kexeced kernel entry according to the requirement, otherwise
        the kexeced kernel would silently BUG at the setup_vm().
    
        Fixes: 8acea455fafa ("RISC-V: Support for kexec_file on panic")
        Signed-off-by: Song Shuai <songshuaishuai@...ylab.org>
        Link: https://lore.kernel.org/r/20230907103304.590739-3-songshuaishuai@tinylab.org
        Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
    
    diff --git a/arch/riscv/kernel/elf_kexec.c b/arch/riscv/kernel/elf_kexec.c
    index 5372b708fae2..9a81d6926ac6 100644
    --- a/arch/riscv/kernel/elf_kexec.c
    +++ b/arch/riscv/kernel/elf_kexec.c
    @@ -98,7 +98,13 @@ static int elf_find_pbase(struct kimage *image, unsigned long kernel_len,
     	kbuf.image = image;
     	kbuf.buf_min = lowest_paddr;
     	kbuf.buf_max = ULONG_MAX;
    -	kbuf.buf_align = PAGE_SIZE;
    +
    +	/*
    +	* Current riscv boot protocol requires 2MB alignment for
    +	* RV64 and 4MB alignment for RV32
    +	*
    +	*/
    +	kbuf.buf_align = PMD_SIZE;
     	kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
     	kbuf.memsz = ALIGN(kernel_len, PAGE_SIZE);
     	kbuf.top_down = false;

>
> -- 
> Cheers,
> Stephen Rothwell