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Left-shifting past the size of your datatype is undefined behaviour in C.
The literal 34 gets the type `int`, and that one is not big enough to be
left shifted by 26 bits.
An `unsigned` is long enough (on any machine that has at least 32 bits for
their ints.)
For uniformity, we mark all the literals as unsigned. But it's only
really needed for HUGETLB_FLAG_ENCODE_16GB.
Thanks to Randy Dunlap for an initial review and suggestion.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthias Goergens <[email protected]>
Acked-by: Randy Dunlap <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Muchun Song <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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This patch syncs contents of tools/include/asm-generic/hugetlb_encode.h
and include/uapi/asm-generic/hugetlb_encode.h. Arch powerpc supports 16KB
hugepages and ARM64 supports 32MB/512MB hugepages. The corresponding mmap
flags have already been added in include/uapi/asm-generic/hugetlb_encode.h,
but not tools/include/asm-generic/hugetlb_encode.h.
Cc: Ingo Molnar <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Yanan Wang <[email protected]>
Reviewed-by: Ben Gardon <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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Time for a sync with ABI/uapi headers with the upcoming v4.14 kernel.
None of the ABI changes require any source code level changes to our
existing in-kernel tooling code:
- tools/arch/s390/include/uapi/asm/kvm.h:
New KVM_S390_VM_TOD_EXT ABI, not used by in-kernel tooling.
- tools/arch/x86/include/asm/cpufeatures.h:
tools/arch/x86/include/asm/disabled-features.h:
New PCID, SME and VGIF x86 CPU feature bits defined.
- tools/include/asm-generic/hugetlb_encode.h:
tools/include/uapi/asm-generic/mman-common.h:
tools/include/uapi/linux/mman.h:
Two new madvise() flags, plus a hugetlb system call mmap flags
restructuring/extension changes.
- tools/include/uapi/drm/drm.h:
tools/include/uapi/drm/i915_drm.h:
New drm_syncobj_create flags definitions, new drm_syncobj_wait
and drm_syncobj_array ABIs. DRM_I915_PERF_* calls and a new
I915_PARAM_HAS_EXEC_FENCE_ARRAY ABI for the Intel driver.
- tools/include/uapi/linux/bpf.h:
New bpf_sock fields (::mark and ::priority), new XDP_REDIRECT
action, new kvm_ppc_smmu_info fields (::data_keys, instr_keys)
Signed-off-by: Ingo Molnar <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Milian Wolff <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Taeung Song <[email protected]>
Cc: Wang Nan <[email protected]>
Cc: Yao Jin <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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