linux/arch/arm/include/asm/memory.h, branch v4.9

ARM: 8589/1: asm/memory.h: remove dead definitions

2016-08-12T15:47:02Z

The last ad-hoc __phys_to_virt definition was removed in commit fd0053c9 ("ARM: realview: remove sparsemem hack"). Therefore we can remove the unneeded definitions and unduplicate the virt_to_pfn macro from asm/memory.h. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King

ARM: provide arm_has_idmap_alias() helper

2016-05-03T10:17:28Z

Provide a helper to indicate whether we need to perform special handling for boot identity mapping aliases or not. Signed-off-by: Russell King Reviewed-by: Pratyush Anand

ARM: provide improved virt_to_idmap() functionality

2016-05-03T10:13:54Z

For kexec, we need more functionality from the IDMAP system. We need to be able to convert physical addresses to their identity mappped versions as well as virtual addresses. Convert the existing arch_virt_to_idmap() to deal with physical addresses instead. Acked-by: Santosh Shilimkar Signed-off-by: Russell King

ARM: 8530/1: remove VIRT_TO_BUS

2016-02-22T16:55:42Z

All drivers that are relevant for rpc or footbridge have stopped using virt_to_bus a while ago, so we can remove it and avoid some harmless randconfig warnings for drivers that we do not care about: drivers/atm/zatm.c: In function 'poll_rx': drivers/atm/zatm.c:401:18: warning: 'bus_to_virt' is deprecated [-Wdeprecated-declarations] skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb; FWIW, the remaining drivers using this are: ATM: firestream, zatm, ambassador, horizon ISDN: hisax/netjet V4L: STA2X11, zoran Net: Appletalk LTPC, Tulip DE4x5, Toshiba IrDA WAN: comtrol sv11, cosa, lanmedia, sealevel SCSI: DPT_I2O, buslogic VME: CA91C142 My best guess is that all of the above are so hopelessly obsolete that we are best off removing all of them form the kernel, but that can be done another time. Signed-off-by: Arnd Bergmann Signed-off-by: Russell King

ARM: make the physical-relative calculation more obvious

2016-02-17T00:28:39Z

The physical-relative calculation between the XIP text and data sections introduced by the previous patch was far from obvious. Let's simplify it by turning it into a macro which takes the two (virtual) addresses. This allows us to arrange the calculation in a more obvious manner - we can make it two sub-expressions which calculate the physical address for each symbol, and then takes the difference of those physical addresses. Signed-off-by: Russell King

ARM: 8512/1: proc-v7.S: Adjust stack address when XIP_KERNEL

2016-02-16T17:17:49Z

When XIP_KERNEL is enabled, the virt to phys address translation for RAM is not the same as the virt to phys address translation for .text. The only way to know where physical RAM is located is to use PLAT_PHYS_OFFSET. The MACRO will be useful for other places where there is a similar problem. Signed-off-by: Nicolas Pitre Signed-off-by: Chris Brandt Signed-off-by: Russell King

ARM: make virt_to_idmap() return unsigned long

2016-02-08T15:47:28Z

Make virt_to_idmap() return an unsigned long rather than phys_addr_t. Returning phys_addr_t here makes no sense, because the definition of virt_to_idmap() is that it shall return a physical address which maps identically with the virtual address. Since virtual addresses are limited to 32-bit, identity mapped physical addresses are as well. Almost all users already had an implicit narrowing cast to unsigned long so let's make this official and part of this interface. Tested-by: Grygorii Strashko Signed-off-by: Russell King

ARM: 8430/1: use default ioremap alignment for SMP or LPAE

2015-09-22T07:13:57Z

16MB alignment for ioremap mappings was added by commit a069c896d0d6 ("[ARM] 3705/1: add supersection support to ioremap()") in order to support supersection mappings. But __arm_ioremap_pfn_caller uses section and supersection mappings only in !SMP && !LPAE case. There is no need for such big alignment if either SMP or LPAE is enabled. After this change, ioremap will use default maximum alignment of 128 pages. Link: https://lkml.kernel.org/g/1419328813-2211-1-git-send-email-d.safonov@partner.samsung.com Cc: Guan Xuetao Cc: Nicolas Pitre Cc: James Bottomley Cc: Will Deacon Cc: Arnd Bergmann Cc: Catalin Marinas Cc: Andrew Morton Cc: Dmitry Safonov Signed-off-by: Sergey Dyasly Signed-off-by: Russell King

mm: move __phys_to_pfn and __pfn_to_phys to asm/generic/memory_model.h

2015-08-27T23:40:58Z

Three architectures already define these, and we'll need them genericly soon. Signed-off-by: Christoph Hellwig Signed-off-by: Dan Williams

ARM: fix __virt_to_idmap build error on !MMU

2015-07-17T14:08:40Z

Fengguang Wu reports that building ARM with !MMU results in the following build error: arch/arm/kernel/built-in.o: In function `__soft_restart': >> :(.text+0x1624): undefined reference to `arch_virt_to_idmap' Fix this by adding an appropriate IS_ENABLED(CONFIG_MMU) into the __virt_to_idmap() inline function. Signed-off-by: Russell King