pm24.git/include/asm-um, branch v2.6.15-rc2

[PATCH] uml: maintain own LDT entries

2005-11-07T15:53:31Z

Patch imlements full LDT handling in SKAS: * UML holds it's own LDT table, used to deliver data on modify_ldt(READ) * UML disables the default_ldt, inherited from the host (SKAS3) or resets LDT entries, set by host's clib and inherited in SKAS0 * A new global variable skas_needs_stub is inserted, that can be used to decide, whether stub-pages must be supported or not. * Uses the syscall-stub to replace missing PTRACE_LDT (therefore, write_ldt_entry needs to be modified) Signed-off-by: Bodo Stroesser Signed-off-by: Jeff Dike Cc: Paolo Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] uml: switch_mm fix

2005-11-07T15:53:31Z

Not quite, something along the lines of the patch below works correctly (and makes aio performance not suffer from multiple second delays), as skas0 mode correctly switches mm contexts, unlike TT (which should probably get nuked from the kernel now that skas0 seems to be working). Signed-off-by: Benjamin LaHaise Signed-off-by: Jeff Dike Cc: Paolo Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] uml: remove old UM_FASTCALL, and make the thing work again

2005-10-31T01:37:16Z

This was used in the old dark age of 2.4, ARCH_CFLAGS doesn't work any more since some time, and UM_FASTCALL was never used in 2.6. Instead, reintroduce the thing more properly now, directly in include/asm-um/linkage.h. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] uml: reuse i386 cpu-specific tuning

2005-10-31T01:37:16Z

Make UML share the underlying cpu-specific tuning done on i386. Actually, for now many config options aren't used a lot - but that can be done later. Also, UML relies on GCC optimization for things like memcpy and such more than i386, so specifying the correct -march and -mtune should be enough. Later, we may want to correct some other stuff. For instance, since FPU context switching, for us, is done (at least partially, i.e. between our kernelspace and userspace) by the host, we may allow usage of FPU operations by GCC. This doesn't hold for kernelspace vs. kernelspace, but we don't support preemption. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] mm: pte_offset_map_lock loops

2005-10-30T04:40:40Z

Convert those common loops using page_table_lock on the outside and pte_offset_map within to use just pte_offset_map_lock within instead. These all hold mmap_sem (some exclusively, some not), so at no level can a page table be whipped away from beneath them. But whereas pte_alloc loops tested with the "atomic" pmd_present, these loops are testing with pmd_none, which on i386 PAE tests both lower and upper halves. That's now unsafe, so add a cast into pmd_none to test only the vital lower half: we lose a little sensitivity to a corrupt middle directory, but not enough to worry about. It appears that i386 and UML were the only architectures vulnerable in this way, and pgd and pud no problem. Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] gfp_t: remaining bits of arch/*

2005-10-28T15:16:51Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

[PATCH] gfp_t: dma-mapping (simple cases)

2005-10-28T15:16:49Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

[PATCH] uml: Fix sysrq-r support for skas mode

2005-10-04T20:22:01Z

The old code had the IP and SP coming from the registers in the thread struct, which are completely wrong since those are the userspace registers. This fixes that by pulling the correct values from the jmp_buf in which the kernel state of each thread is stored. Signed-off-by: Allan Graves Signed-off-by: Jeff Dike Signed-off-by: Linus Torvalds

[PATCH] uml get_user() NULL noise removal

2005-09-30T15:42:24Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

[PATCH] uml: don't redundantly mark pte as newpage in pte_modify

2005-09-23T05:17:36Z

pte_modify marks a page as needing flush, which is redundant because the resulting PTE is still set with set_pte, which already handles that. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Cc: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds