Re: ioremap and dma cleanups and fixes for superh (2nd resend)

[John Paul Adrian Glaubitz]

On 7/15/20 4:37 PM, John Paul Adrian Glaubitz wrote:
> Okay, kernel 5.0.0 does not suffer from this bug. So I should be able to bisect
> this particular issue.
> 
> I'm glad I don't have to start bisecting with earlier kernels because these
> won't build easily with my current toolchain based on gcc-9.
> 
> Will report once I found the bad commit that introduced the problem.

Found the culprit:

c5b27a889da92f4a969d61df77bd4f79ffce57c9 is the first bad commit
commit c5b27a889da92f4a969d61df77bd4f79ffce57c9
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date:   Tue Sep 4 14:45:04 2018 +0200

    sh/tlb: Convert SH to generic mmu_gather
    
    Generic mmu_gather provides everything SH needs (range tracking and
    cache coherency).
    
    No change in behavior intended.
    
    Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
    Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
    Cc: Andy Lutomirski <luto@xxxxxxxxxx>
    Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
    Cc: Borislav Petkov <bp@xxxxxxxxx>
    Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
    Cc: H. Peter Anvin <hpa@xxxxxxxxx>
    Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
    Cc: Nick Piggin <npiggin@xxxxxxxxx>
    Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
    Cc: Rich Felker <dalias@xxxxxxxx>
    Cc: Rik van Riel <riel@xxxxxxxxxxx>
    Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
    Cc: Will Deacon <will.deacon@xxxxxxx>
    Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>

 arch/sh/include/asm/pgalloc.h |   9 +++
 arch/sh/include/asm/tlb.h     | 130 +-----------------------------------------
 2 files changed, 10 insertions(+), 129 deletions(-)

CC'ing the author (Peter Zijlstra <peterz@xxxxxxxxxxxxx>).

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@xxxxxxxxxx
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