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authorMark Rutland <mark.rutland@arm.com>2015-01-05 12:24:47 (GMT)
committerWill Deacon <will.deacon@arm.com>2015-01-07 11:40:58 (GMT)
commit0f9132ceab112ab75d34865f5aeddf0bac234896 (patch)
tree11209f8c56edbfe614da3bf0b8a95c90e5cfc7d9
parentb1940cd21c0f4abdce101253e860feff547291b0 (diff)
downloadlinux-0f9132ceab112ab75d34865f5aeddf0bac234896.tar.xz
arm64: Correct __NR_compat_syscalls for bpf
Commit 97b56be10352a70c (arm64: compat: Enable bpf syscall) made the usual mistake of forgetting to update __NR_compat_syscalls. Due to this, when el0_sync_compat calls el0_svc_naked, the test against sc_nr (__NR_compat_syscalls) will fail, and we'll call ni_sys, returning -ENOSYS to userspace. This patch bumps __NR_compat_syscalls appropriately, enabling the use of the bpf syscall from compat tasks. Due to the reorganisation of unistd{,32}.h as part of commit f3e5c847ec3d12b4 (arm64: Add __NR_* definitions for compat syscalls) it is not currently possible to include both headers and sanity-check the value of __NR_compat_syscalls at build-time to prevent this from happening again. Additional rework is required to make such niceties a possibility. Cc: Will Deacon <will.deacon@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
-rw-r--r--arch/arm64/include/asm/unistd.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 49c9aef..b780c6c 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -44,7 +44,7 @@
#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE+2)
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE+5)
-#define __NR_compat_syscalls 386
+#define __NR_compat_syscalls 387
#endif
#define __ARCH_WANT_SYS_CLONE