diff options
| author | Linus Torvalds | 2024-07-24 10:29:50 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2024-07-24 10:29:50 -0700 |
| commit | 7a3fad30fd8b4b5e370906b3c554f64026f56c2f (patch) | |
| tree | ad1f004b3157bf01db1295b6de37df8673089989 /tools/include | |
| parent | d1e9a63dcd7248385bbbccf1650d69e4af914f05 (diff) | |
| parent | ad8070cb1b4bd40aa19a5e3f7c24d7f62c71b382 (diff) | |
Merge tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator updates from Jason Donenfeld:
"This adds getrandom() support to the vDSO.
First, it adds a new kind of mapping to mmap(2), MAP_DROPPABLE, which
lets the kernel zero out pages anytime under memory pressure, which
enables allocating memory that never gets swapped to disk but also
doesn't count as being mlocked.
Then, the vDSO implementation of getrandom() is introduced in a
generic manner and hooked into random.c.
Next, this is implemented on x86. (Also, though it's not ready for
this pull, somebody has begun an arm64 implementation already)
Finally, two vDSO selftests are added.
There are also two housekeeping cleanup commits"
* tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
MAINTAINERS: add random.h headers to RNG subsection
random: note that RNDGETPOOL was removed in 2.6.9-rc2
selftests/vDSO: add tests for vgetrandom
x86: vdso: Wire up getrandom() vDSO implementation
random: introduce generic vDSO getrandom() implementation
mm: add MAP_DROPPABLE for designating always lazily freeable mappings
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/asm/rwonce.h | 0 | ||||
| -rw-r--r-- | tools/include/uapi/linux/mman.h | 1 |
2 files changed, 1 insertions, 0 deletions
diff --git a/tools/include/asm/rwonce.h b/tools/include/asm/rwonce.h new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/tools/include/asm/rwonce.h diff --git a/tools/include/uapi/linux/mman.h b/tools/include/uapi/linux/mman.h index a246e11988d5..e89d00528f2f 100644 --- a/tools/include/uapi/linux/mman.h +++ b/tools/include/uapi/linux/mman.h @@ -17,6 +17,7 @@ #define MAP_SHARED 0x01 /* Share changes */ #define MAP_PRIVATE 0x02 /* Changes are private */ #define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ +#define MAP_DROPPABLE 0x08 /* Zero memory under memory pressure. */ /* * Huge page size encoding when MAP_HUGETLB is specified, and a huge page |