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| author | Michal Simek <michal.simek@xilinx.com> | 2013-08-13 16:00:53 -0700 |
|---|---|---|
| committer | Kamal Mostafa <kamal@canonical.com> | 2013-08-21 10:58:33 -0700 |
| commit | 4ede5f6893e255dc2aaf474ed1e6b8fa955a9b06 (patch) | |
| tree | 89f97110692d59dd7140f223eadd8a317f0e0a9f /arch | |
| parent | 7551ed3fba27ce65c6c31db791175d67bf378469 (diff) | |
microblaze: fix clone syscall
commit dfa9771a7c4784bafd0673bc7abcee3813088b77 upstream.
Fix inadvertent breakage in the clone syscall ABI for Microblaze that
was introduced in commit f3268edbe6fe ("microblaze: switch to generic
fork/vfork/clone").
The Microblaze syscall ABI for clone takes the parent tid address in the
4th argument; the third argument slot is used for the stack size. The
incorrectly-used CLONE_BACKWARDS type assigned parent tid to the 3rd
slot.
This commit restores the original ABI so that existing userspace libc
code will work correctly.
All kernel versions from v3.8-rc1 were affected.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Kconfig | 6 | ||||
| -rw-r--r-- | arch/microblaze/Kconfig | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 7f8f281f2585..acb6d034aba3 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -373,4 +373,10 @@ config CLONE_BACKWARDS2 help Architecture has the first two arguments of clone(2) swapped. +config CLONE_BACKWARDS3 + bool + help + Architecture has tls passed as the 3rd argument of clone(2), + not the 5th one. + source "kernel/gcov/Kconfig" diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index ba3b7c8c04b8..458991c78e52 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -26,7 +26,7 @@ config MICROBLAZE select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA - select CLONE_BACKWARDS + select CLONE_BACKWARDS3 config SWAP def_bool n |