kernel/git/stable/linux.git/arch/mips/vdso, branch master

Merge tag 'timers-vdso-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2026-08-18T23:56:25+00:00

Pull VDSO updates from Thomas Gleixner: - Consolidate the VDSO datastore further and provide support for mlock_all() and prefaulting. - Provide 32-bit legacy time related functionality only if CONFIG_COMPAT_32BIT_TIME is enabled. The config switch exists, but architecture code still exposes the legacy functionality even disabled. Clean this up by adding the missing guards and validating at build time that the VDSO is legacy free if disabled. - Consolidate the VDSO related config options in core and drivers, which removes some non-sensical dependencies and quite an amount of #ifdeffery. - Clean up the PAGE_SIZE definition maze * tag 'timers-vdso-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits) random: vDSO: Drop custom PAGE_SIZE definitions LoongArch: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery clocksource/drivers/timer-riscv: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery clocksource/drivers/arm_arch_timer: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery clocksource/drivers/mips-gic-timer: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery MIPS: csrc-r4k: Remove CONFIG_GENERIC_GETTIMEOFDAY ifdeffery vDSO: Make clockmode constants available without CONFIG_GENERIC_GETTIMEOFDAY kbuild: Support generated asm-headers in subdirectories vdso: Rename HAVE_GENERIC_VDSO to VDSO_DATASTORE vdso: Drop HAVE_GENERIC_VDSO from architecture kconfig files vdso: Automatically select HAVE_GENERIC_VDSO if necessary MIPS: vdso: Stop using CONFIG_HAVE_GENERIC_VDSO vdso: Remove the dependency on HAVE_GENERIC_VDSO from ARCH_HAS_VDSO_ARCH_DATA futex: Remove dependency on HAVE_GENERIC_VDSO from FUTEX_ROBUST_UNLOCK vdso/gettimeofday: Verify COMPAT_32BIT_TIME interactions sparc: vdso: Respect COMPAT_32BIT_TIME MIPS: VDSO: Respect COMPAT_32BIT_TIME powerpc/vdso: Respect COMPAT_32BIT_TIME ARM: VDSO: Respect COMPAT_32BIT_TIME arm64: vdso32: Respect COMPAT_32BIT_TIME ...

MIPS: VDSO: Respect COMPAT_32BIT_TIME

2026-07-07T21:52:53+00:00

If CONFIG_COMPAT_32BIT_TIME is disabled then the vDSO should not provide any 32-bit time related functionality. This is the intended effect of the kconfig option and also the fallback system calls would also not be implemented. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Reviewed-by: Arnd Bergmann Link: https://patch.msgid.link/20260702-vdso-compat_32bit_time-v3-7-db9f36d8d432@linutronix.de

mips: Add build salt to the vDSO

2026-06-29T09:29:43+00:00

The vDSO needs to have a unique build id in a similar manner to the kernel and modules. Use the build salt macro. Signed-off-by: Bastian Blank Signed-off-by: Thomas Bogendoerfer

Merge tag 'mips_7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2026-06-19T14:46:16+00:00

Pull MIPS updates from Thomas Bogendoerfer: - use software nodes for GPIO code - cleanups and fixes * tag 'mips_7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (41 commits) mips: select legacy gpiolib interfaces where used MIPS: lib: Remove '.hidden' for local symbols MIPS: VDSO: Avoid including .got in dynamic segment MIPS: smp: report dying CPU to RCU in stop_this_cpu() MIPS: kernel: proc: Delete unnecessary braces in show_cpuinfo() MIPS: kernel: proc: Use seq_putc() calls in show_cpuinfo() mips: sched: Fix CPUMASK_OFFSTACK memory corruption MIPS: mm: Fix out-of-bounds write in maar_res_walk() MIPS: ath79: reduce ARCH_DMA_MINALIGN mips: dts: ar9132: fix wdt node name mips: Remove remaining defconfig references to the pktcdvd driver MIPS: mm: remove comment referring to removed CONFIG_MIPS_CMP MIPS: alchemy: db1300: switch to static device properties MIPS: alchemy: gpr: switch to static device properties MIPS: alchemy: db1000: use nodes attached to GPIO chips in properties MIPS: alchemy: mtx1: attach software nodes to GPIO chips MIPS: alchemy: provide visible function prototypes to board files MIPS: alchemy: platform: add missing include MIPS: ip22-gio: do not export device release function MIPS: ip22-gio: switch to dynamic root device ...

MIPS: VDSO: Avoid including .got in dynamic segment

2026-06-15T10:21:16+00:00

After commit 2db1ec80dfd5 ("MIPS: VDSO: Fold MIPS_DISABLE_VDSO into MIPS_GENERIC_GETTIMEOFDAY"), building ARCH=mips allnoconfig with LLVM=1 shows some warnings from llvm-readelf while checking the VDSO for dynamic relocations: llvm-readelf: warning: 'arch/mips/vdso/vdso.so.dbg.raw': invalid PT_DYNAMIC size (0xa4) llvm-readelf: warning: 'arch/mips/vdso/vdso.so.dbg.raw': PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used The blamed commit alters the link order of objects into vdso.so.raw, placing vgettimeofday.o after sigreturn.o. This ultimately results in the .text section shrinking slightly in size, which in turn changes the offset of the .dynamic section. - [ 9] .text PROGBITS 000002f0 0002f0 000930 00 AX 0 0 16 - [10] .dynamic DYNAMIC 00000c20 000c20 000090 08 A 5 0 4 + [ 9] .text PROGBITS 000002f0 0002f0 000924 00 AX 0 0 16 + [10] .dynamic DYNAMIC 00000c14 000c14 000090 08 A 5 0 4 Changing the offset of the .dynamic section causes the dynamic segment size to grow by the same amount, which triggers a warning in llvm-readelf because PT_DYNAMIC's p_filesz (0xa4) is no longer a multiple of its sh_entsize (8): - DYNAMIC 0x000c20 0x00000c20 0x00000c20 0x00098 0x00098 R 0x10 + DYNAMIC 0x000c14 0x00000c14 0x00000c14 0x000a4 0x000a4 R 0x10 The size of the dynamic segment was already incorrect before the blamed comment, as it should be 0x90 like the .dynamic section above (18 entries at 8 bytes per entry); it just so happens that 0x98 % 8 is 0, whereas 0xa4 % 8 is 4, so there was no warning. Looking at the section to segment mapping of the dynamic segment reveals that it includes the .got section, as it is implicitly placed after .dynamic by ld.lld's orphan section heuristics and inherits its segments from the linker script. [ 9] .text PROGBITS 000002f0 0002f0 000924 00 AX 0 0 16 [10] .dynamic DYNAMIC 00000c14 000c14 000090 08 A 5 0 4 [11] .got PROGBITS 00000cb0 000cb0 000008 00 WAp 0 0 16 Section to Segment mapping: Segment Sections... 00 .mips_abiflags 01 .reginfo 02 .mips_abiflags .reginfo .hash .dynsym .dynstr .gnu.version .gnu.version_d .note .text .dynamic .got 03 .dynamic .got 04 .note Explicitly describe the .got section in the MIPS VDSO linker script after .rodata, which switches back to the default text segment, resulting in a dynamic segment that is the exact size of the .dynamic section as expected with no other layout changes. - DYNAMIC 0x000c14 0x00000c14 0x00000c14 0x000a4 0x000a4 R 0x10 + DYNAMIC 0x000c14 0x00000c14 0x00000c14 0x00090 0x00090 R 0x4 - 03 .dynamic .got + 03 .dynamic Closes: https://github.com/ClangBuiltLinux/linux/issues/2166 Fixes: 2db1ec80dfd5 ("MIPS: VDSO: Fold MIPS_DISABLE_VDSO into MIPS_GENERIC_GETTIMEOFDAY") Signed-off-by: Nathan Chancellor Reviewed-by: Thomas Weißschuh Acked-by: Nick Desaulniers Signed-off-by: Thomas Bogendoerfer

MIPS: VDSO: Fold MIPS_CLOCK_VSYSCALL into MIPS_GENERIC_GETTIMEOFDAY

2026-06-09T15:02:10+00:00

This configuration option exists so "that we don't provide the symbol when there's no possibility of there being a usable clocksource". However it only covers __vdso_gettimeofday() and none of the other vDSO functions which should be affected by the same circumstances.slightly slightly. Remove MIPS_CLOCK_VSYSCALL and fold its usecase into MIPS_GENERIC_GETTIMEOFDAY, which works correctly. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Cc: Thomas Bogendoerfer Cc: Daniel Lezcano Cc: Thomas Gleixner Cc: Andy Lutomirski Cc: Vincenzo Frascino Cc: Arnd Bergmann Cc: linux-mips@vger.kernel.org Link: https://patch.msgid.link/20260521-vdso-mips-kconfig-v1-9-2f79dcd6c78f@linutronix.de

MIPS: VDSO: Fold MIPS_DISABLE_VDSO into MIPS_GENERIC_GETTIMEOFDAY

2026-06-09T15:02:10+00:00

The currently used MIPS_DISABLE_VDSO will disable only the userspace bits of the time-related vDSO. The kernel part is still pointlessly built and running. Remove MIPS_DISABLE_VDSO and fold its usecase into MIPS_GENERIC_GETTIMEOFDAY, which works correctly. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Cc: Thomas Bogendoerfer Cc: Daniel Lezcano Cc: Thomas Gleixner Cc: Andy Lutomirski Cc: Vincenzo Frascino Cc: Arnd Bergmann Cc: linux-mips@vger.kernel.org Link: https://patch.msgid.link/20260521-vdso-mips-kconfig-v1-7-2f79dcd6c78f@linutronix.de

MIPS: vdso: Provide getres_time64() for 32-bit ABIs

2026-01-13T13:42:23+00:00

For consistency with __vdso_clock_gettime64() there should also be a 64-bit variant of clock_getres(). This will allow the extension of CONFIG_COMPAT_32BIT_TIME to the vDSO and finally the removal of 32-bit time types from the kernel and UAPI. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20251223-vdso-compat-time32-v1-9-97ea7a06a543@linutronix.de

mips: Add -std= flag specified in KBUILD_CFLAGS to vdso CFLAGS

2025-04-27T07:37:10+00:00

GCC 15 changed the default C standard dialect from gnu17 to gnu23, which should not have impacted the kernel because it explicitly requests the gnu11 standard in the main Makefile. However, mips/vdso code uses its own CFLAGS without a '-std=' value, which break with this dialect change because of the kernel's own definitions of bool, false, and true conflicting with the C23 reserved keywords. include/linux/stddef.h:11:9: error: cannot use keyword 'false' as enumeration constant 11 | false = 0, | ^~~~~ include/linux/stddef.h:11:9: note: 'false' is a keyword with '-std=c23' onwards include/linux/types.h:35:33: error: 'bool' cannot be defined via 'typedef' 35 | typedef _Bool bool; | ^~~~ include/linux/types.h:35:33: note: 'bool' is a keyword with '-std=c23' onwards Add -std as specified in KBUILD_CFLAGS to the decompressor and purgatory CFLAGS to eliminate these errors and make the C standard version of these areas match the rest of the kernel. Signed-off-by: Khem Raj Cc: stable@vger.kernel.org Signed-off-by: Thomas Bogendoerfer

MIPS: vdso: Switch to generic storage implementation

2025-02-21T08:54:02+00:00

The generic storage implementation provides the same features as the custom one. However it can be shared between architectures, making maintenance easier. Co-developed-by: Nam Cao Signed-off-by: Nam Cao Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-13-13a4669dfc8c@linutronix.de