The patch titled
um: adjust current_thread_info() for gcc-4.6
has been added to the -mm tree. Its filename is
um-adjust-current_thread_info-for-gcc-46.patch
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------------------------------------------------------
Subject: um: adjust current_thread_info() for gcc-4.6
From: Richard Weinberger <richard@xxxxxx>
In some cases gcc-4.6 will optimize away current_thread_info(). To
prevent gcc from doing so the stack address has to be obtained via inline
asm.
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/um/include/asm/thread_info.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN arch/um/include/asm/thread_info.h~um-adjust-current_thread_info-for-gcc-46 arch/um/include/asm/thread_info.h
--- a/arch/um/include/asm/thread_info.h~um-adjust-current_thread_info-for-gcc-46
+++ a/arch/um/include/asm/thread_info.h
@@ -49,7 +49,10 @@ static inline struct thread_info *curren
{
struct thread_info *ti;
unsigned long mask = THREAD_SIZE - 1;
- ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
+ void *p;
+
+ asm volatile ("" : "=r" (p) : "0" (&ti));
+ ti = (struct thread_info *) (((unsigned long)p) & ~mask);
return ti;
}
_
Patches currently in -mm which might be from richard@xxxxxx are
um-adjust-current_thread_info-for-gcc-46.patch
um-mdd-support-for-64-bit-atomic-operations.patch
uml-fix-hppfs-build.patch
mm-mmu_gather-rework.patch
powerpc-mmu_gather-rework.patch
sparc-mmu_gather-rework.patch
s390-mmu_gather-rework.patch
arm-mmu_gather-rework.patch
sh-mmu_gather-rework.patch
ia64-mmu_gather-rework.patch
um-mmu_gather-rework.patch
mm-now-that-all-old-mmu_gather-code-is-gone-remove-the-storage.patch
mm-powerpc-move-the-rcu-page-table-freeing-into-generic-code.patch
mm-extended-batches-for-generic-mmu_gather.patch
lockdep-mutex-provide-mutex_lock_nest_lock.patch
mm-remove-i_mmap_lock-lockbreak.patch
mm-convert-i_mmap_lock-to-a-mutex.patch
mm-revert-page_lock_anon_vma-lock-annotation.patch
mm-improve-page_lock_anon_vma-comment.patch
mm-use-refcounts-for-page_lock_anon_vma.patch
mm-convert-anon_vma-lock-to-a-mutex.patch
mm-optimize-page_lock_anon_vma-fast-path.patch
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