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Commit 1bb6b874 authored by Colin Cross's avatar Colin Cross Committed by Trilok Soni
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ARM64: implement TASK_SIZE_OF 



include/linux/sched.h implements TASK_SIZE_OF as TASK_SIZE if it
is not set by the architecture headers.  TASK_SIZE uses the
current task to determine the size of the virtual address space.
On a 64-bit kernel this will cause reading /proc/pid/pagemap of a
64-bit process from a 32-bit process to return EOF when it reads
past 0xffffffff.

Implement TASK_SIZE_OF exactly the same as TASK_SIZE with
test_tsk_thread_flag instead of test_thread_flag.

Change-Id: I55c53e5c108757d5f6b6ce1c9f78dfb220e29502
Signed-off-by: default avatarColin Cross <ccross@android.com>
Git-repo: git://codeaurora.org/quic/la/kernel/tegra.git


Git-commit: b21cba50d8ee47e6b4a6bbef0d61852bde9ca04d
Signed-off-by: default avatarTrilok Soni <tsoni@codeaurora.org>
parent ff1ff8e0

arch/arm64/include/asm/memory.h

+2 −0
Original line number Diff line number Diff line
@@ -56,6 +56,8 @@ 
#define TASK_SIZE_32		UL(0x100000000)

#define TASK_SIZE		(test_thread_flag(TIF_32BIT) ? \

				TASK_SIZE_32 : TASK_SIZE_64)

#define TASK_SIZE_OF(tsk)	(test_tsk_thread_flag(tsk, TIF_32BIT) ? \

				TASK_SIZE_32 : TASK_SIZE_64)

#else

#define TASK_SIZE		TASK_SIZE_64

#endif /* CONFIG_COMPAT */