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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-14 23:26:08 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-14 23:26:08 +0200 |
commit | b923f1247b72fc100b87792fd2129d026bb10e66 (patch) | |
tree | 543e2f3bcf171d1abf61594e9bea4e52c0368246 /arch/arm | |
parent | Merge tag 'timers-core-2020-08-14' of git://git.kernel.org/pub/scm/linux/kern... (diff) | |
parent | time: Delete repeated words in comments (diff) | |
download | linux-b923f1247b72fc100b87792fd2129d026bb10e66.tar.xz linux-b923f1247b72fc100b87792fd2129d026bb10e66.zip |
Merge tag 'timers-urgent-2020-08-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timekeeping updates from Thomas Gleixner:
"A set of timekeeping/VDSO updates:
- Preparatory work to allow S390 to switch over to the generic VDSO
implementation.
S390 requires that the VDSO data pointer is handed in to the
counter read function when time namespace support is enabled.
Adding the pointer is a NOOP for all other architectures because
the compiler is supposed to optimize that out when it is unused in
the architecture specific inline. The change also solved a similar
problem for MIPS which fortunately has time namespaces not yet
enabled.
S390 needs to update clock related VDSO data independent of the
timekeeping updates. This was solved so far with yet another
sequence counter in the S390 implementation. A better solution is
to utilize the already existing VDSO sequence count for this. The
core code now exposes helper functions which allow to serialize
against the timekeeper code and against concurrent readers.
S390 needs extra data for their clock readout function. The initial
common VDSO data structure did not provide a way to add that. It
now has an embedded architecture specific struct embedded which
defaults to an empty struct.
Doing this now avoids tree dependencies and conflicts post rc1 and
allows all other architectures which work on generic VDSO support
to work from a common upstream base.
- A trivial comment fix"
* tag 'timers-urgent-2020-08-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Delete repeated words in comments
lib/vdso: Allow to add architecture-specific vdso data
timekeeping/vsyscall: Provide vdso_update_begin/end()
vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter()
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/include/asm/vdso/gettimeofday.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/include/asm/vdso/gettimeofday.h b/arch/arm/include/asm/vdso/gettimeofday.h index 1b207cf07697..2134cbd5469f 100644 --- a/arch/arm/include/asm/vdso/gettimeofday.h +++ b/arch/arm/include/asm/vdso/gettimeofday.h @@ -113,7 +113,8 @@ static inline bool arm_vdso_hres_capable(void) } #define __arch_vdso_hres_capable arm_vdso_hres_capable -static __always_inline u64 __arch_get_hw_counter(int clock_mode) +static __always_inline u64 __arch_get_hw_counter(int clock_mode, + const struct vdso_data *vd) { #ifdef CONFIG_ARM_ARCH_TIMER u64 cycle_now; |