Re: + ipc-sem-use-flexible-array-in-struct-sem_undo.patch added to mm-nonmm-unstable branch

[Manfred Spraul]

Hi Christophe,

On 7/10/23 22:35, Andrew Morton wrote:
> The patch titled
>       Subject: ipc/sem: use flexible array in 'struct sem_undo'
> has been added to the -mm mm-nonmm-unstable branch.  Its filename is
>       ipc-sem-use-flexible-array-in-struct-sem_undo.patch
>
> This patch will shortly appear at
>       https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ipc-sem-use-flexible-array-in-struct-sem_undo.patch
>
> This patch will later appear in the mm-nonmm-unstable branch at
>      git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>
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>
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>
> The -mm tree is included into linux-next via the mm-everything
> branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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>
> ------------------------------------------------------
> From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
> Subject: ipc/sem: use flexible array in 'struct sem_undo'
> Date: Sun, 9 Jul 2023 18:12:55 +0200
>
> Turn 'semadj' in 'struct sem_undo' into a flexible array.
>
> The advantages are:
>     - save the size of a pointer when the new undo structure is allocated
>     - avoid some always ugly pointer arithmetic to get the address of semadj
>     - avoid an indirection when the array is accessed
>
> While at it, use struct_size() to compute the size of the new undo
> structure.
>
> Link: https://lkml.kernel.org/r/1ba993d443ad7e16ac2b1902adab1f05ebdfa454.1688918791.git.christophe.jaillet@xxxxxxxxxx
> Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
> Cc: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
> Cc: Jann Horn <jannh@xxxxxxxxxx>
> Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
> Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>

Reviewed-by: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>


--

    Manfred