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Brendan Jackman c66ae64401 tools: testing: use existing atomic.h for vma/maple tests 
The shared userspace logic used for unit-testing maple tree and VMA code
currently has its own replacements for atomics helpers.  This is not
needed as the necessary APIs already have userspace implementations in the
tools tree.  Switching over to that allows deleting a bit of code.

Note that the implementation is different; while the version being deleted
here is implemented using liburcu, the existing version in tools uses
either x86 asm or compiler builtins.  It's assumed that both are equally
likely to be correct.

The tools tree's version of atomic_t is a struct type while the version
being deleted was just a typedef of an integer.  This means it's no longer
valid to call __sync_bool_compare_and_swap() directly on it.  One option
would be to just peek into the struct and call it on the field, but it
seems a little cleaner to just use the corresponding atomic.h API whic has
been added recently.  Now the fake mapping_map_writable() is copied from
the real one.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Brendan Jackman <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Reviewed-by: Pedro Falcato <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Liam Howlett <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
 2025-09-13 16:55:25 -07:00
Suren Baghdasaryan 4bbb6df62c tools: fix atomic_set() definition to set the value correctly 
Currently vma test is failing because of the new vma_assert_attached()
assertion.  The check is failing because previous refcount_set() inside
vma_mark_attached() is a NoOp.  Fix the definition of atomic_set() to
correctly set the value of the atomic.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 9325b8b5a1 ("tools: add skeleton code for userland testing of VMA logic")
Signed-off-by: Suren Baghdasaryan <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
 2025-01-12 19:03:35 -08:00
Lorenzo Stoakes 74579d8dab tools: separate out shared radix-tree components 
The core components contained within the radix-tree tests which provide
shims for kernel headers and access to the maple tree are useful for
testing other things, so separate them out and make the radix tree tests
dependent on the shared components.

This lays the groundwork for us to add VMA tests of the newly introduced
vma.c file.

Link: https://lkml.kernel.org/r/1ee720c265808168e0d75608e687607d77c36719.1722251717.git.lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Reviewed-by: Liam R. Howlett <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Brendan Higgins <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: David Gow <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Rae Moar <[email protected]>
Cc: SeongJae Park <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Pengfei Xu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
 2024-09-01 20:25:55 -07:00