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2020-03-21arm64: vdso32: Include common headers in the vdso libraryVincenzo Frascino2-3/+1
The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Refactor the vdso32 implementation to include common headers. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/20200320145351.32292-22-vincenzo.frascino@arm.com
2020-03-21arm64: vdso: Include common headers in the vdso libraryVincenzo Frascino2-3/+0
The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Refactor the vdso implementation to include common headers. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/20200320145351.32292-21-vincenzo.frascino@arm.com
2020-03-21arm64: Introduce asm/vdso/processor.hVincenzo Frascino2-5/+19
The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Introduce asm/vdso/processor.h to contain all the arm64 specific functions that are suitable for vDSO inclusion. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/20200320145351.32292-20-vincenzo.frascino@arm.com
2020-03-21arm64: vdso32: Code clean upVincenzo Frascino2-20/+0
The compat vdso library had some checks that are not anymore relevant. Remove the unused code from the compat vDSO library. Note: This patch is preparatory for a future one that will introduce asm/vdso/processor.h on arm64. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/lkml/20200317122220.30393-19-vincenzo.frascino@arm.com Link: https://lkml.kernel.org/r/20200320145351.32292-19-vincenzo.frascino@arm.com
2020-03-21linux/elfnote.h: Replace elf.h with UAPI equivalentVincenzo Frascino1-1/+1
The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Replace linux/elf.h with UAPI equivalent in elfnote.h to make the header suitable for vDSO inclusion. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200320145351.32292-18-vincenzo.frascino@arm.com
2020-03-21scripts: Fix the inclusion order in modpostVincenzo Frascino1-1/+5
In the process of creating the source file of a module modpost injects a set of includes that are not required if the compilation unit is statically built into the kernel. The order of inclusion of the headers can cause redefinition problems (e.g.): In file included from include/linux/elf.h:5:0, from include/linux/module.h:18, from crypto/arc4.mod.c:2: #define ELF_OSABI ELFOSABI_LINUX In file included from include/linux/elfnote.h:62:0, from include/linux/build-salt.h:4, from crypto/arc4.mod.c:1: include/uapi/linux/elf.h:363:0: note: this is the location of the previous definition #define ELF_OSABI ELFOSABI_NONE The issue was exposed during the development of the series [1]. [1] https://lore.kernel.org/lkml/20200306133242.26279-1-vincenzo.frascino@arm.com/ Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Link: https://lkml.kernel.org/r/20200320145351.32292-17-vincenzo.frascino@arm.com