Re: [PATCH v2 0/8] powerpc/signal: Convert to scoped user access

["Christophe Leroy (CS GROUP)" <chleroy@kernel.org>]

Le 02/06/2026 à 10:46, Christophe Leroy (CS GROUP) a écrit :
> This series converts powerpc architecture signal handling to scoped
> user access and enlarges some of the block accesses to minimise the
> number of times user access has to be opened and closed.
> 
> As mentioned in individual patches, some bring real performance
> improvement.
> 
> This series is built from previous series [1] which predates
> implementation of scoped user access.
> 
> [1] https://lore.kernel.org/all/1718f38859d5366f82d5bef531f255cedf537b5d.1631861883.git.christophe.leroy@csgroup.eu/T/#t

Sashiko made relevant comments, I need to rework this series.

> 
> Changes in v2:
> - Add a stub setup_tm_sigcontexts() for when CONFIG_PPC_TRANSACTIONAL_MEM is not set in patch 2
> 
> Christophe Leroy (CS GROUP) (8):
>    powerpc/signal32: Convert to scoped user access
>    powerpc/signal64: Untangle setup_tm_sigcontexts() and
>      user_access_begin()
>    powerpc/signal64: Convert to scoped user access
>    powerpc/signal64: Access function descriptor with scoped user access
>    powerpc/signal: Include the new stack frame inside the user access
>      block
>    signal: Add unsafe_copy_siginfo_to_user()
>    powerpc/uaccess: Add unsafe_clear_user()
>    powerpc/signal: Use unsafe_copy_siginfo_to_user()
> 
>   arch/powerpc/include/asm/uaccess.h |  20 ++
>   arch/powerpc/kernel/signal_32.c    | 498 ++++++++++++++---------------
>   arch/powerpc/kernel/signal_64.c    | 138 ++++----
>   include/linux/signal.h             |  15 +
>   include/linux/uaccess.h            |   1 +
>   kernel/signal.c                    |   5 -
>   6 files changed, 334 insertions(+), 343 deletions(-)
> 

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