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authorAl Viro <viro@zeniv.linux.org.uk>2012-11-18 12:50:10 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-12-19 18:07:39 -0500
commit1ca97bb541a1f5a735e697a8bba763cde3aab452 (patch)
tree548d835c0f13de780678922ba3b3ea4c841e8cd7 /net
parent5208ba24e7826519d310474dedaed2f84b0ab6a0 (diff)
downloadvexpress-lsk-1ca97bb541a1f5a735e697a8bba763cde3aab452.tar.gz
new helper: current_user_stack_pointer()
Cross-architecture equivalent of rdusp(); default is user_stack_pointer(current_pt_regs()) - that works for almost all platforms that have usp saved in pt_regs. The only exception from that is ia64 - we want memory stack, not the backing store for register one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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