Quoting Peter Zijlstra (2019-02-28 14:54:56) > drivers/gpu/drm/i915/i915_gem_execbuffer.o: warning: objtool: > .altinstr_replacement+0x3c: redundant UACCESS disable > drivers/gpu/drm/i915/i915_gem_execbuffer.o: warning: objtool: > .altinstr_replacement+0x66: redundant UACCESS disable > > AKA. you don't need user_access_end() if user_access_begin() fails.
Cool, I had no idea if it was required or not. The closest to instructions on how to use user_access_begin() is in arch/x86/include/asm/uaccess.h ... which I guess is earlier in this series! > Cc: Chris Wilson <ch...@chris-wilson.co.uk> > Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk> -Chris
