linux.git/include/asm-um, branch v2.6.21.7

[PATCH] uml: fix unreasonably long udelay

2007-04-02T17:06:08+00:00

Currently we have a confused udelay implementation.

* __const_udelay does not accept usecs but xloops in i386 and x86_64
* our implementation requires usecs as arg
* it gets a xloops count when called by asm/arch/delay.h

Bugs related to this (extremely long shutdown times) where reported by some
x86_64 users, especially using Device Mapper.

To hit this bug, a compile-time constant time parameter must be passed -
that's why UML seems to work most times.  Fix this with a simple udelay
implementation.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Acked-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix static linking for real

2007-03-31T02:21:30+00:00

There was a typo in commit 7632fc8f809a97f9d82ce125e8e3e579390ce2e5,
preventing it from working - 32bit binaries crashed hopelessly before
the below fix and work perfectly now.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix pte bit collision

2007-03-29T15:22:24+00:00

_PAGE_PROTNONE conflicts with the lowest bit of pgoff.  This causes all sorts
of weirdness when nonlinear mappings are used.

Took me a good half day to track this down.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Jeff Dike 
Acked-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix static linking

2007-03-27T16:05:15+00:00

During a static link, ld has started putting a .note section in the
.uml.setup.init section.  This has the result that the UML setups begin
with 32 bytes of garbage and UML crashes immediately on boot.

This patch creates a specific .note section for ld to drop this stuff
into.

Signed-off-by: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: pte_mkread fix

2007-03-01T22:53:38+00:00

Fix the fact that pte_mkread set _PAGE_RW instead of _PAGE_USER (the logic is
copied from i386 in most place, so it is really as bad as you're thinking).

Thus currently page tables are more permissive than they should.

Such a change may trigger other latent bugs, so be careful with this.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: x86_64 ptrace fixes

2007-02-11T18:51:24+00:00

This patch fixes some missing ptrace bits on x86_64.  PTRACE_ARCH_PRCTL is
hooked up and implemented.  This required generalizing arch_prctl_skas
slightly to take a task_struct to modify.  Previously, it always operated on
current.

Reading and writing the debug registers is also enabled by un-ifdefing the
code that implements that.  It turns out that x86_64 is identical to i386, so
the same code can be used.

Signed-off-by: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: x86_64 thread fixes

2007-02-11T18:51:24+00:00

x86_64 needs some TLS fixes.  What was missing was remembering the child
thread id during clone and stuffing it into the child during each context
switch.

The %fs value is stored separately in the thread structure since the host
controls what effect it has on the actual register file.  The host also needs
to store it in its own thread struct, so we need the value kept outside the
register file.

arch_prctl_skas was fixed to call PTRACE_ARCH_PRCTL appropriately.  There is
some saving and restoring of registers in the ARCH_SET_* cases so that the
correct set of registers are changed on the host and restored to the process
when it runs again.

Signed-off-by: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix apparent "CONFIG_64_BIT" typo.

2007-02-11T18:51:23+00:00

Fix apparent typo, where CONFIG_64_BIT should read CONFIG_64BIT.

Signed-off-by: Robert P. J. Day 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml-i386: fix build breakage with CONFIG_HIGHMEM

2007-02-02T00:17:06+00:00

missing helper used by arch/i386/mm/highmem.c, which is pulled
into build on that configuration.

Signed-off-by: Al Viro 
Acked-by: Jeff Dike 
Signed-off-by: Linus Torvalds

[PATCH] UML: add generic BUG support

2006-12-08T16:28:39+00:00

The BUG changes in -mm3 need some arch support.  This patch adds the UML
support needed.  For the most part, it was stolen from the underlying
architecture.  The exception is the kernel eip < PAGE_OFFSET test, which is
wrong for skas mode UMLs.

Signed-off-by: Jeff Dike 
Cc: Jeremy Fitzhardinge 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds