linux/arch/arm/kernel, branch v2.6.27.4

kgdb, x86, arm, mips, powerpc: ignore user space single stepping

2008-09-26T15:36:41Z

On the x86 arch, user space single step exceptions should be ignored if they occur in the kernel space, such as ptrace stepping through a system call. First check if it is kgdb that is executing a single step, then ensure it is not an accidental traversal into the user space, while in kgdb, any other time the TIF_SINGLESTEP is set, kgdb should ignore the exception. On x86, arm, mips and powerpc, the kgdb_contthread usage was inconsistent with the way single stepping is implemented in the kgdb core. The arch specific stub should always set the kgdb_cpu_doing_single_step correctly if it is single stepping. This allows kgdb to correctly process an instruction steps if ptrace happens to be requesting an instruction step over a system call. Signed-off-by: Jason Wessel

Merge master.kernel.org:/home/rmk/linux-2.6-arm

2008-08-16T23:48:45Z

* master.kernel.org:/home/rmk/linux-2.6-arm: (38 commits) [ARM] 5191/1: ARM: remove CVS keywords [ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified [ARM] pxafb: add flag to specify output format on LDD pins when base is RGBT16 [ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD [ARM] 5198/1: PalmTX: PCMCIA fixes [ARM] Fix a pile of broken watchdog drivers [ARM] update mach-types [ARM] 5196/1: fix inline asm constraints for preload [ARM] 5194/1: update .gitignore [ARM] add proc-macros.S include to proc-arm940 and proc-arm946 [ARM] 5192/1: ARM TLB: add v7wbi_{possible,always}_flags to {possible,always}_tlb_flags [ARM] 5193/1: Wire up missing syscalls [ARM] traps: don't call undef hook functions with spinlock held [ARM] 5183/2: Provide Poodle LoCoMo GPIO names [ARM] dma-mapping: provide sync_range APIs [ARM] dma-mapping: improve type-safeness of DMA translations [ARM] Kirkwood: instantiate the orion_spi driver in the platform code [ARM] prevent crashing when too much RAM installed [ARM] Kirkwood: Instantiate mv_xor driver [ARM] Orion: Instantiate mv_xor driver for 5182 ...

kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE

2008-08-15T15:35:42Z

Rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE, because control page is used for not only code on some platform. For example in kexec jump, it is used for data and stack too. [akpm@linux-foundation.org: unbreak powerpc and arm, finish conversion] Signed-off-by: Huang Ying Cc: Pavel Machek Cc: "Rafael J. Wysocki" Cc: "Eric W. Biederman" Cc: Vivek Goyal Cc: Ingo Molnar Cc: Russell King Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[ARM] 5194/1: update .gitignore

2008-08-12T18:54:09Z

Signed-off-by: Nicolas Pitre Signed-off-by: Russell King

[ARM] 5193/1: Wire up missing syscalls

2008-08-12T18:54:07Z

Setup some missing syscall pointed out by the checksyscalls.sh script. Fix two small whitespace issues while being there. Signed-off-by: Stefan Schmidt Signed-off-by: Russell King

[ARM] traps: don't call undef hook functions with spinlock held

2008-08-12T18:54:07Z

Calling the undefined instruction handler functions with a spinlock held is a recipe for must_sleep() warnings. Avoid it. Signed-off-by: Russell King

Merge branch 'for-rmk' of git://git.marvell.com/orion

2008-08-09T17:03:13Z

[ARM] prevent crashing when too much RAM installed

2008-08-09T13:38:15Z

This patch will truncate and/or ignore memory banks if their kernel direct mappings would (partially) overlap with the vmalloc area or the mappings between the vmalloc area and the address space top, to prevent crashing during early boot if there happens to be more RAM installed than we are expecting. Since the start of the vmalloc area is not at a fixed address (but the vmalloc end address is, via the per-platform VMALLOC_END define), a default area of 128M is reserved for vmalloc mappings, which can be shrunk or enlarged by passing an appropriate vmalloc= command line option as it is done on x86. On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe000000, two 512M RAM banks and vmalloc=128M (the default), this patch gives: Truncating RAM at 20000000-3fffffff to -35ffffff (vmalloc region overlap). Memory: 512MB 352MB = 864MB total On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe800000, two 256M RAM banks and vmalloc=768M, this patch gives: Truncating RAM at 00000000-0fffffff to -0e7fffff (vmalloc region overlap). Ignoring RAM at 10000000-1fffffff (vmalloc region overlap). Signed-off-by: Lennert Buytenhek Tested-by: Riku Voipio

[ARM] Fix SMP booting with non-zero PHYS_OFFSET

2008-08-07T21:36:59Z

The existing code tries to get the pmd for the temporary page table by doing: pgd = pgd_alloc(&init_mm); pmd = pmd_offset(pgd, PHYS_OFFSET); Since we have a two level page table, pmd_offset() is a no-op, so this just has a casting effect from a pgd to a pmd - the address argument is unused. So this can't work. Normally, we'd do: pgd = pgd_offset(&init_mm, PHYS_OFFSET); ... pmd = pmd_offset(pgd, PHYS_OFFSET); to get the pmd you want. However, pgd_offset() takes the mm_struct, not the (unattached) pgd we just allocated. So, instead use: pgd = pgd_alloc(&init_mm); pmd = pmd_offset(pgd + pgd_index(PHYS_OFFSET), PHYS_OFFSET); Reported-by: Antti P Miettinen Signed-off-by: Russell King

[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach

2008-08-07T08:55:48Z

This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King