linux/arch, branch v2.6.22.4

powerpc: Fix size check for hugetlbfs

2007-08-15T16:25:09Z

My "slices" address space management code that was added in 2.6.22 implementation of get_unmapped_area() doesn't properly check that the size is a multiple of the requested page size. This allows userland to create VMAs that aren't a multiple of the huge page size with hugetlbfs (since hugetlbfs entirely relies on get_unmapped_area() to do that checking) which leads to a kernel BUG() when such areas are torn down. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras Signed-off-by: Greg Kroah-Hartman

PPC: Revert "[POWERPC] Add 'mdio' to bus scan id list for platforms with QE UEC"

2007-08-15T16:25:09Z

This reverts commit 3baee955953957be5496cd28e9c544d9db214262. this was a mistake from the start; I added mdio type to the bus scan list early on in my ucc_geth migrate to phylib development, which is just pure wrong (the ucc_geth_mii driver creates the mii bus and the PHY layer handles PHY enumeration without translation). this accompanies commit 77926826f301fbd8ed96d3cd9ff17a5b59560dfb: Revert "[POWERPC] Don't complain if size-cells == 0 in prom_parse()" which was basically trying to hide a symptom of the original mistake this revert fixes. Signed-off-by: Kim Phillips Signed-off-by: Greg Kroah-Hartman

PPC: Revert "[POWERPC] Don't complain if size-cells == 0 in prom_parse()"

2007-08-15T16:25:09Z

This reverts commit fd6e9d3945ee122eb513ada8b17296d243c1ce5e. Having #size-cells == 0 in a node indicates that things under the node aren't directly accessible, and therefore we shouldn't try to translate addresses for devices under the node into CPU physical addresses. Some drivers, such as the nvram driver for powermacs, rely on of_address_to_resource failing if they are called for a node representing a device whose resources aren't directly accessible by the CPU. These drivers were broken by commit fd6e9d39, resulting in the "Lombard" powerbook hanging early in the boot process. stable team, this patch is equivalent to commit 77926826f301fbd8ed96d3cd9ff17a5b59560dfb Signed-off-by: Paul Mackerras Cc: Kim Phillips Signed-off-by: Greg Kroah-Hartman

UML: exports for hostfs

2007-08-09T21:27:47Z

Add some exports for hostfs that are required after Alberto Bertogli's fixes for accessing unlinked host files. Also did some style cleanups while I was here. Signed-off-by: Jeff Dike Signed-off-by: Greg Kroah-Hartman

uml: limit request size on COWed devices

2007-08-09T21:27:41Z

COWed devices can't handle more than 32 (64 on x86_64) sectors in one request due to the size of the bitmap being carried around in the io_thread_req. Enforce that by telling the block layer not to put too many sectors in requests to COWed devices. Signed-off-by: Jeff Dike Cc: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

acpi-cpufreq: Proper ReadModifyWrite of PERF_CTL MSR

2007-08-09T21:27:40Z

[CPUFREQ] acpi-cpufreq: Proper ReadModifyWrite of PERF_CTL MSR During recent acpi-cpufreq changes, writing to PERF_CTL msr changed from RMW of entire 64 bit to RMW of low 32 bit and clearing of upper 32 bit. Fix it back to do a proper RMW of the MSR. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Dave Jones Cc: Chuck Ebbert Signed-off-by: Greg Kroah-Hartman

i386: HPET, check if the counter works

2007-08-09T21:27:37Z

Some systems have a HPET which is not incrementing, which leads to a complete hang. Detect it during HPET setup. Signed-off-by: Thomas Gleixner Signed-off-by: Andi Kleen Cc: john stultz Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

Fix sparc32 udelay() rounding errors.

2007-08-09T21:27:30Z

[SPARC32]: Fix rounding errors in ndelay/udelay implementation. __ndelay and __udelay have not been delayung >= specified time. The problem with __ndelay has been tacked down to the rounding of the multiplier constant. By changing this, delays > app 18us are correctly calculated. The problem with __udelay has also been tracked down to rounding issues. Changing the multiplier constant (to match that used in sparc64) corrects for large delays and adding in a rounding constant corrects for trunctaion errors in the claculations. Many short delays will return without looping. This is not an error as there is the fixed delay of doing all the maths to calculate the loop count. Signed-off-by: Mark Fortescue Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

Fix sparc32 memset()

2007-08-09T21:27:30Z

[SPARC32]: Fix bug in sparc optimized memset. Sparc optimized memset (arch/sparc/lib/memset.S) does not fill last byte of the memory area, if area size is less than 8 bytes and start address is not word (4-bytes) aligned. Here is code chunk where bug located: /* %o0 - memory address, %o1 - size, %g3 - value */ 8: add %o0, 1, %o0 subcc %o1, 1, %o1 bne,a 8b stb %g3, [%o0 - 1] This code should write byte every loop iteration, but last time delay instruction stb is not executed because branch instruction sets "annul" bit. Patch replaces bne,a by bne instruction. Error can be reproduced by simple kernel module: -------------------- #include #include #include #include #include static void do_memset(void **p, int size) { memset(p, 0x00, size); } static int __init memset_test_init(void) { char fooc[8]; int *fooi; memset(fooc, 0xba, sizeof(fooc)); do_memset((void**)(fooc + 3), 1); fooi = (int*) fooc; printk("%08X %08X\n", fooi[0], fooi[1]); return -1; } static void __exit memset_test_cleanup(void) { return; } module_init(memset_test_init); module_exit(memset_test_cleanup); MODULE_LICENSE("GPL"); EXPORT_NO_SYMBOLS; ------------------------ Signed-off-by: Alexander Shmelev Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

Sparc64 bootup assembler bug

2007-08-09T21:27:29Z

[SPARC64]: Fix two year old bug in early bootup asm. We try to fetch the CIF entry pointer from %o4, but that can get clobbered by the early OBP calls. It is saved in %l7 already, so actually this "mov %o4, %l7" can just be completely removed with no other changes. Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman