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Chris Metcalf 2c7387ef99 asm-generic/stat.h: support 64-bit file time_t for stat() ... The existing asm-generic/stat.h specifies st_mtime, etc., as a 32-value, and works well for 32-bit architectures (currently microblaze, score, and 32-bit tile). However, for 64-bit architectures it isn't sufficient to return 32 bits of time_t; this isn't good insurance against the 2037 rollover. (It also makes glibc support less convenient, since we can't use glibc's handy STAT_IS_KERNEL_STAT mode.) This change extends the two "timespec" fields for each of the three atime, mtime, and ctime fields from "int" to "long". As a result, on 32-bit platforms nothing changes, and 64-bit platforms will now work as expected. The only wrinkle is 32-bit userspace under 64-bit kernels taking advantage of COMPAT mode. For these, we leave the "struct stat64" definitions with the "int" versions of the time_t and nsec fields, so that architectures can implement compat_sys_stat64() and friends with sys_stat64(), etc., and get the expected 32-bit structure layout. This requires a field-by-field copy in the kernel, implemented by the code guarded under __ARCH_WANT_STAT64. This does mean that the shape of the "struct stat" and "struct stat64" structures is different on a 64-bit kernel, but only one of the two structures should ever be used by any given process: "struct stat" is meant for 64-bit userspace only, and "struct stat64" for 32-bit userspace only. (On a 32-bit kernel the two structures continue to have the same shape, since "long" is 32 bits.) The alternative is keeping the two structures the same shape on 64-bit kernels, which means a 64-bit time_t in "struct stat64" for 32-bit processes. This is a little unnatural since 32-bit userspace can't do anything with 64 bits of time_t information, since time_t is just "long", not "int64_t"; and in any case 32-bit userspace might expect to be running under a 32-bit kernel, which can't provide the high 32 bits anyway. In the case of a 32-bit kernel we'd then be extending the kernel's 32-bit time_t to 64 bits, then truncating it back to 32 bits again in userspace, for no particular reason. And, as mentioned above, if we have 64-bit time_t for 32-bit processes we can't easily use glibc's STAT_IS_KERNEL_STAT, since glibc's stat structure requires an embedded "struct timespec", which is a pair of "long" (32-bit) values in a 32-bit userspace. "Inventive" solutions are possible, but are pretty hacky. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de>		14 years ago
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bitops	bitops: remove duplicated extern declarations	15 years ago
4level-fixup.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
Kbuild	include: replace unifdef-y with header-y	15 years ago
Kbuild.asm	include: replace unifdef-y with header-y	15 years ago
atomic-long.h	asm-generic: merge branch 'master' of torvalds/linux-2.6	16 years ago
atomic.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic	14 years ago
atomic64.h	lib: Provide generic atomic64_t implementation	16 years ago
audit_change_attr.h	audit: make link()/linkat() match "attribute change" predicate	14 years ago
audit_dir_write.h	…
audit_read.h	…
audit_signal.h	…
audit_write.h	…
auxvec.h	asm-generic: add generic ABI headers	16 years ago
bitops.h	asm-generic: make bitops.h usable	16 years ago
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	16 years ago
bug.h	panic: Allow warnings to set different taint flags	15 years ago
bugs.h	asm-generic: add generic versions of common headers	16 years ago
cache.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
cacheflush.h	block: add helpers to run flush_dcache_page() against a bio and a request's pages	15 years ago
checksum.h	add generic lib/checksum.c	16 years ago
cmpxchg-local.h	Fix IRQ flag handling naming	15 years ago
cmpxchg.h	…
cputime.h	taskstats: use real microsecond granularity for CPU times	14 years ago
current.h	asm-generic: add generic versions of common headers	16 years ago
delay.h	asm-generic: add generic versions of common headers	16 years ago
device.h	Driver Core: Add platform device arch data V3	16 years ago
div64.h	…
dma-coherent.h	…
dma-mapping-broken.h	dma-mapping: remove dma_is_consistent API	15 years ago
dma-mapping-common.h	dma-mapping: remove unnecessary sync_single_range_* in dma_map_ops	15 years ago
dma.h	asm-generic: add legacy I/O header files	16 years ago
emergency-restart.h	…
errno-base.h	…
errno.h	cfg80211: add rfkill support	16 years ago
fb.h	asm-generic: add generic versions of common headers	16 years ago
fcntl.h	asm-generic: fcntl: make exported headers use strict posix types	15 years ago
futex.h	…
getorder.h	asm-generic: rename page.h and uaccess.h	16 years ago
gpio.h	gpiolib: fix HAVE_GPIO_LIB leftovers in asm-generic/gpio.h	14 years ago
hardirq.h	Fix IRQ flag handling naming	15 years ago
hw_irq.h	asm-generic: add legacy I/O header files	16 years ago
ide_iops.h	…
int-l64.h	asm-generic: introduce asm/bitsperlong.h	16 years ago
int-ll64.h	asm-generic: introduce asm/bitsperlong.h	16 years ago
io.h	asm-generic/io.h: allow people to override individual funcs	15 years ago
ioctl.h	…
ioctls.h	ioctl: Use asm-generic/ioctls.h on cris (enables termiox)	14 years ago
iomap.h	…
ipcbuf.h	asm-generic: add generic sysv ipc headers	16 years ago
irq.h	asm-generic: add generic versions of common headers	16 years ago
irq_regs.h	…
irqflags.h	Fix IRQ flag handling naming	15 years ago
kdebug.h	asm-generic: kdebug.h: Checkpatch cleanup	15 years ago
kmap_types.h	include/asm-generic/kmap_types.h: add helpful reminder	15 years ago
libata-portmap.h	…
linkage.h	asm-generic: add generic versions of common headers	16 years ago
local.h	local_t: Remove cpu_local_xx macros	15 years ago
local64.h	arch: Implement local64_t	15 years ago
memory_model.h	tree-wide: fix assorted typos all over the place	15 years ago
mm_hooks.h	…
mman-common.h	HWPOISON: Add a madvise() injector for soft page offlining	15 years ago
mman.h	mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions	16 years ago
mmu.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
mmu_context.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
module.h	asm-generic: add generic versions of common headers	16 years ago
msgbuf.h	asm-generic: add generic sysv ipc headers	16 years ago
mutex-dec.h	…
mutex-null.h	…
mutex-xchg.h	…
mutex.h	asm-generic: add generic versions of common headers	16 years ago
page.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
param.h	asm-generic: add generic ABI headers	16 years ago
parport.h	asm-generic: add legacy I/O header files	16 years ago
pci-dma-compat.h	dma-mapping: pci: move pci_set_dma_mask and pci_set_consistent_dma_mask to pci-dma-compat.h	15 years ago
pci.h	PCI: remove pcibios_scan_all_fns()	16 years ago
percpu.h	percpu: Optimize __get_cpu_var()	15 years ago
pgalloc.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
pgtable-nopmd.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
pgtable-nopud.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
pgtable.h	[S390] add support for nonquiescing sske	14 years ago
poll.h	…
posix_types.h	asm-generic: add generic ABI headers	16 years ago
resource.h	…
rtc.h	asm-generic: make get_rtc_time overridable	16 years ago
scatterlist.h	asm-generic: remove ARCH_HAS_SG_CHAIN in scatterlist.h	15 years ago
sections.h	asm/sections: add text/data checking functions for arches to override	16 years ago
segment.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
sembuf.h	asm-generic: add generic sysv ipc headers	16 years ago
serial.h	asm-generic: add legacy I/O header files	16 years ago
setup.h	asm-generic: add generic ABI headers	16 years ago
shmbuf.h	asm-generic: add generic sysv ipc headers	16 years ago
shmparam.h	asm-generic: add generic sysv ipc headers	16 years ago
siginfo.h	HWPOISON: Add new SIGBUS error codes for hardware poison signals	16 years ago
signal-defs.h	asm-generic: rename termios.h, signal.h and mman.h	16 years ago
signal.h	asm-generic: add generic ABI headers	16 years ago
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	16 years ago
sockios.h	asm-generic: add generic ABI headers	16 years ago
spinlock.h	asm-generic: add generic versions of common headers	16 years ago
stat.h	asm-generic/stat.h: support 64-bit file time_t for stat()	14 years ago
statfs.h	add f_flags to struct statfs(64)	15 years ago
string.h	asm-generic: add generic versions of common headers	16 years ago
swab.h	asm-generic: add generic ABI headers	16 years ago
syscall.h	asm-generic: syscall_get_nr returns int	16 years ago
syscalls.h	Fix the declaration of sys_execve() in asm-generic/syscalls.h	15 years ago
system.h	asm-generic: cmpxchg does not handle non-long arguments	15 years ago
termbits.h	tty: Add EXTPROC support for LINEMODE	15 years ago
termios-base.h	asm-generic: rename termios.h, signal.h and mman.h	16 years ago
termios.h	asm-generic: add generic ABI headers	16 years ago
timex.h	asm-generic: add legacy I/O header files	16 years ago
tlb.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	16 years ago
tlbflush.h	asm-generic: add generic NOMMU versions of some headers	16 years ago
topology.h	topology: alternate fix for ia64 tiger_defconfig build breakage	15 years ago
types.h	asm-generic: add generic ABI headers	16 years ago
uaccess-unaligned.h	asm-generic: rename page.h and uaccess.h	16 years ago
uaccess.h	asm-generic: uaccess: fix up local access_ok() usage	16 years ago
ucontext.h	asm-generic: add generic ABI headers	16 years ago
unaligned.h	asm-generic: add generic versions of common headers	16 years ago
unistd.h	Add fanotify syscalls to <asm-generic/unistd.h>.	15 years ago
user.h	asm-generic: add generic versions of common headers	16 years ago
vga.h	asm-generic: add legacy I/O header files	16 years ago
vmlinux.lds.h	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	14 years ago
xor.h	…