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authorLinus Torvalds <torvalds@linux-foundation.org>2014-03-07 17:37:45 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-03-07 17:37:45 -0800
commit9579f10dfdd91d5a1bc77a588b630bc945d9fb95 (patch)
treebe262474a629de6dd18803162a2d3bbb857ee3df
parent721f0c126075294e66df73051cc2e1d795ef2095 (diff)
parenta5b2cf5b1af424ee3dd9e3ce6d5cea18cb927e67 (diff)
downloadlinux-9579f10dfdd91d5a1bc77a588b630bc945d9fb95.tar.gz
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull power fixes from Ben Herrenschmidt: "Here are a couple of powerpc fixes for 3.14. One is (another!) nasty TM problem, we can crash the kernel by forking inside a transaction. The other one is a simple fix for an alignment issue which can hurt in LE mode" * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Align p_dyn, p_rela and p_st symbols powerpc/tm: Fix crash when forking inside a transaction
-rw-r--r--arch/powerpc/kernel/process.c9
-rw-r--r--arch/powerpc/kernel/reloc_64.S1
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 8d4c247f1738..af064d28b365 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1048,6 +1048,15 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
flush_altivec_to_thread(src);
flush_vsx_to_thread(src);
flush_spe_to_thread(src);
+ /*
+ * Flush TM state out so we can copy it. __switch_to_tm() does this
+ * flush but it removes the checkpointed state from the current CPU and
+ * transitions the CPU out of TM mode. Hence we need to call
+ * tm_recheckpoint_new_task() (on the same task) to restore the
+ * checkpointed state back and the TM mode.
+ */
+ __switch_to_tm(src);
+ tm_recheckpoint_new_task(src);
*dst = *src;
diff --git a/arch/powerpc/kernel/reloc_64.S b/arch/powerpc/kernel/reloc_64.S
index 1482327cfeba..d88736fbece6 100644
--- a/arch/powerpc/kernel/reloc_64.S
+++ b/arch/powerpc/kernel/reloc_64.S
@@ -81,6 +81,7 @@ _GLOBAL(relocate)
6: blr
+.balign 8
p_dyn: .llong __dynamic_start - 0b
p_rela: .llong __rela_dyn_start - 0b
p_st: .llong _stext - 0b