linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2019-06-19	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	Thomas Gleixner	1	-4/+1
	Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-08	arm64/kernel: kaslr: reduce module randomization range to 4 GB	Ard Biesheuvel	1	-0/+4
	We currently have to rely on the GCC large code model for KASLR for two distinct but related reasons: - if we enable full randomization, modules will be loaded very far away from the core kernel, where they are out of range for ADRP instructions, - even without full randomization, the fact that the 128 MB module region is now no longer fully reserved for kernel modules means that there is a very low likelihood that the normal bottom-up allocation of other vmalloc regions may collide, and use up the range for other things. Large model code is suboptimal, given that each symbol reference involves a literal load that goes through the D-cache, reducing cache utilization. But more importantly, literals are not instructions but part of .text nonetheless, and hence mapped with executable permissions. So let's get rid of our dependency on the large model for KASLR, by: - reducing the full randomization range to 4 GB, thereby ensuring that ADRP references between modules and the kernel are always in range, - reduce the spillover range to 4 GB as well, so that we fallback to a region that is still guaranteed to be in range - move the randomization window of the core kernel to the middle of the VMALLOC space Note that KASAN always uses the module region outside of the vmalloc space, so keep the kernel close to that if KASAN is enabled. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2012-06-28	ARM: 7430/1: sizes.h: move from asm-generic to <linux/sizes.h>	Alessandro Rubini	1	-0/+47
	sizes.h is used throughout the AMBA code and drivers, so the header should be available to everyone in order to driver AMBA/PrimeCell peripherals behind a PCI bridge where the host can be any platform (I'm doing it under x86). At this step <asm-generic/sizes.h> includes <linux/sizes.h>, to allow a grace period for both in-tree and out-of-tree drivers. Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>