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| author | Catalin Marinas <catalin.marinas@arm.com> | 2022-01-31 16:54:54 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-02-15 22:53:29 +0000 |
| commit | ab1e435ca7913e384ed801210418633eee43a71b (patch) | |
| tree | dc0de96848ca1ced16bef297e43239d96ea511da /arch/arm64/mm | |
| parent | 761b9b366cec0c81a1cd80930f00611d86521d1b (diff) | |
| download | linux-ab1e435ca7913e384ed801210418633eee43a71b.tar.bz2 | |
arm64: mte: Define the number of bytes for storing the tags in a page
Rather than explicitly calculating the number of bytes for a compact tag
storage format corresponding to a page, just add a MTE_PAGE_TAG_STORAGE
macro. With the current MTE implementation of 4 bits per tag, we store
2 tags in a byte.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Luis Machado <luis.machado@linaro.org>
Link: https://lore.kernel.org/r/20220131165456.2160675-4-catalin.marinas@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/mteswap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/mm/mteswap.c b/arch/arm64/mm/mteswap.c index 7c4ef56265ee..a9e50e930484 100644 --- a/arch/arm64/mm/mteswap.c +++ b/arch/arm64/mm/mteswap.c @@ -12,7 +12,7 @@ static DEFINE_XARRAY(mte_pages); void *mte_allocate_tag_storage(void) { /* tags granule is 16 bytes, 2 tags stored per byte */ - return kmalloc(PAGE_SIZE / 16 / 2, GFP_KERNEL); + return kmalloc(MTE_PAGE_TAG_STORAGE, GFP_KERNEL); } void mte_free_tag_storage(char *storage) |