kernel.git/arch/x86/kernel/tls.c, branch linux-3.7.y

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-03-29T21:28:26Z

Pull x86 updates from Ingo Molnar. This touches some non-x86 files due to the sanitized INLINE_SPIN_UNLOCK config usage. Fixed up trivial conflicts due to just header include changes (removing headers due to cpu_idle() merge clashing with the split). * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic/amd: Be more verbose about LVT offset assignments x86, tls: Off by one limit check x86/ioapic: Add io_apic_ops driver layer to allow interception x86/olpc: Add debugfs interface for EC commands x86: Merge the x86_32 and x86_64 cpu_idle() functions x86/kconfig: Remove CONFIG_TR=y from the defconfigs x86: Stop recursive fault in print_context_stack after stack overflow x86/io_apic: Move and reenable irq only when CONFIG_GENERIC_PENDING_IRQ=y x86/apic: Add separate apic_id_valid() functions for selected apic drivers locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage x86/kconfig: Update defconfigs x86: Fix excessive MSR print out when show_msr is not specified

Disintegrate asm/system.h for X86

2012-03-28T17:11:12Z

Disintegrate asm/system.h for X86. Signed-off-by: David Howells Acked-by: H. Peter Anvin cc: x86@kernel.org

x86, tls: Off by one limit check

2012-03-28T16:39:35Z

These are used as offsets into an array of GDT_ENTRY_TLS_ENTRIES members so GDT_ENTRY_TLS_ENTRIES is one past the end of the array. Signed-off-by: Dan Carpenter Link: http://lkml.kernel.org/r/20120324075250.GA28258@elgon.mountain Cc: Signed-off-by: H. Peter Anvin

x86: Introducing asm/syscalls.h

2008-07-22T12:35:57Z

Declaring arch-dependent syscalls for x86 architecture Signed-off-by: Jaswinder Singh

asmlinkage_protect replaces prevent_tail_call

2008-04-11T00:28:26Z

The prevent_tail_call() macro works around the problem of the compiler clobbering argument words on the stack, which for asmlinkage functions is the caller's (user's) struct pt_regs. The tail/sibling-call optimization is not the only way that the compiler can decide to use stack argument words as scratch space, which we have to prevent. Other optimizations can do it too. Until we have new compiler support to make "asmlinkage" binding on the compiler's own use of the stack argument frame, we have work around all the manifestations of this issue that crop up. More cases seem to be prevented by also keeping the incoming argument variables live at the end of the function. This makes their original stack slots attractive places to leave those variables, so the compiler tends not clobber them for something else. It's still no guarantee, but it handles some observed cases that prevent_tail_call() did not. Signed-off-by: Roland McGrath Signed-off-by: Linus Torvalds

x86: tls prevent_tail_call

2008-02-29T17:55:39Z

Fix a kernel bug (vmware boot problem) reported by Tomasz Grobelny, which occurs with certain .config variants and gccs. The x86 TLS cleanup in commit efd1ca52d04d2f6df337a3332cee56cd60e6d4c4 made the sys_set_thread_area and sys_get_thread_area functions ripe for tail call optimization. If the compiler chooses to use it for them, it can clobber the user trap frame because these are asmlinkage functions. Reported-by: Tomasz Grobelny Signed-off-by: Roland McGrath Signed-off-by: Ingo Molnar

x86: x86 user_regset TLS

2008-01-30T12:31:52Z

This adds accessor functions in the user_regset style for the TLS data. Signed-off-by: Roland McGrath Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

x86: x86 TLS desc_struct cleanup

2008-01-30T12:31:51Z

This cleans up the TLS code to use struct desc_struct and to separate the encoding and installation magic from the interface wrappers. Signed-off-by: Roland McGrath Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

x86: modify get_desc_base

2008-01-30T12:31:14Z

This patch makes get_desc_base() receive a struct desc_struct, and then uses its internal fields to compute the base address. This is done at both i386 and x86_64, and then it is moved to common header Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

x86: introduce fill_ldt

2008-01-30T12:31:13Z

This patch introduces fill_ldt(), which populates a ldt descriptor from a user_desc in once, instead of relying in the LDT_entry_a and LDT_entry_b macros Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner