[CRIU] [PATCH 2/6] AArch64: Remove TASK_SIZE from mmap_seized

[Christopher Covington]

TASK_SIZE for AArch64 may be any of several options between (1 << 39)
and (1 << 48), inclusive, depending on kernel configuration. Go back
to just checking the most significant bit, as was done before commit
3f12d688ae563b91d8a738d68902ea2e23f2b59c was made to accomodate 32-bit
ARM (before mmap_seized got architecture-specific implementations).

This fixes the following error for AArch64 kernels with
CONFIG_ARM64_64K_PAGES=y.

Error (parasite-syscall.c:1105): Can't allocate memory for parasite blob (pid: 104)

Signed-off-by: Christopher Covington <cov at codeaurora.org>
---
 arch/aarch64/crtools.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/aarch64/crtools.c b/arch/aarch64/crtools.c
index 18224b0..13668cd 100644
--- a/arch/aarch64/crtools.c
+++ b/arch/aarch64/crtools.c
@@ -211,7 +211,7 @@ void *mmap_seized(
 
 	err = syscall_seized(ctl, __NR_mmap, &map,
 			(unsigned long)addr, length, prot, flags, fd, offset);
-	if (err < 0 || map > TASK_SIZE)
+	if (err < 0 || (long)map < 0)
 		map = 0;
 
 	return (void *)map;
-- 
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