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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-15 02:39:13 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-15 02:39:13 +0300
commit1202f4fdbcb6deeffd3eb39c94b8dc0cc8202b16 (patch)
treeb822d71e82e13846d3a77ffd08b8ef6e571d7d37 /include/linux/compat.h
parentd0055f351e647f33f3b0329bff022213bf8aa085 (diff)
parent3c4d9137eefecf273a520d392071ffc9df0a9a7a (diff)
downloadlinux-1202f4fdbcb6deeffd3eb39c94b8dc0cc8202b16.tar.xz
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon: "A bunch of good stuff in here. Worth noting is that we've pulled in the x86/mm branch from -tip so that we can make use of the core ioremap changes which allow us to put down huge mappings in the vmalloc area without screwing up the TLB. Much of the positive diffstat is because of the rseq selftest for arm64. Summary: - Wire up support for qspinlock, replacing our trusty ticket lock code - Add an IPI to flush_icache_range() to ensure that stale instructions fetched into the pipeline are discarded along with the I-cache lines - Support for the GCC "stackleak" plugin - Support for restartable sequences, plus an arm64 port for the selftest - Kexec/kdump support on systems booting with ACPI - Rewrite of our syscall entry code in C, which allows us to zero the GPRs on entry from userspace - Support for chained PMU counters, allowing 64-bit event counters to be constructed on current CPUs - Ensure scheduler topology information is kept up-to-date with CPU hotplug events - Re-enable support for huge vmalloc/IO mappings now that the core code has the correct hooks to use break-before-make sequences - Miscellaneous, non-critical fixes and cleanups" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (90 commits) arm64: alternative: Use true and false for boolean values arm64: kexec: Add comment to explain use of __flush_icache_range() arm64: sdei: Mark sdei stack helper functions as static arm64, kaslr: export offset in VMCOREINFO ELF notes arm64: perf: Add cap_user_time aarch64 efi/libstub: Only disable stackleak plugin for arm64 arm64: drop unused kernel_neon_begin_partial() macro arm64: kexec: machine_kexec should call __flush_icache_range arm64: svc: Ensure hardirq tracing is updated before return arm64: mm: Export __sync_icache_dcache() for xen-privcmd drivers/perf: arm-ccn: Use devm_ioremap_resource() to map memory arm64: Add support for STACKLEAK gcc plugin arm64: Add stack information to on_accessible_stack drivers/perf: hisi: update the sccl_id/ccl_id when MT is supported arm64: fix ACPI dependencies rseq/selftests: Add support for arm64 arm64: acpi: fix alignment fault in accessing ACPI efi/arm: map UEFI memory map even w/o runtime services enabled efi/arm: preserve early mapping of UEFI memory map longer for BGRT drivers: acpi: add dependency of EFI for arm64 ...
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index df45ee8413d6..1a3c4f37e908 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -1019,6 +1019,17 @@ static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
return ctv;
}
+/*
+ * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
+ * directly. Instead, use one of the functions which work equivalently, such
+ * as the kcompat_sys_xyzyyz() functions prototyped below.
+ */
+
+int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
+ struct compat_statfs64 __user * buf);
+int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
+ struct compat_statfs64 __user * buf);
+
#else /* !CONFIG_COMPAT */
#define is_compat_task() (0)