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author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-06-14 12:43:54 +0200 |
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committer | Will Deacon <will.deacon@arm.com> | 2017-06-20 12:42:57 +0100 |
commit | 737326aa510b5f7d2f38ded739914a9d5e4e4cea (patch) | |
tree | a52c62c3a616157f5c83231bdc7115e902e2bbc8 /Documentation | |
parent | drivers/char: kmem: disable on arm64 (diff) | |
download | linux-dev-737326aa510b5f7d2f38ded739914a9d5e4e4cea.tar.xz linux-dev-737326aa510b5f7d2f38ded739914a9d5e4e4cea.zip |
fs/proc: kcore: use kcore_list type to check for vmalloc/module address
Instead of passing each start address into is_vmalloc_or_module_addr()
to decide whether it falls into either the VMALLOC or the MODULES region,
we can simply check the type field of the current kcore_list entry, since
it will be set to KCORE_VMALLOC based on exactly the same conditions.
As a bonus, when reading the KCORE_TEXT region on architectures that have
one, this will avoid using vread() on the region if it happens to intersect
with a KCORE_VMALLOC region. This is due the fact that the KCORE_TEXT
region is the first one to be added to the kcore region list.
Reported-by: Tan Xiaojun <tanxiaojun@huawei.com>
Tested-by: Tan Xiaojun <tanxiaojun@huawei.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions