In case of VM_FAULT_RETRY, __get_user_pages returns the number of pages alredy gotten, but there isn't a check if this number is zero. Instead, we have to return a proper error code so we can avoid a possible extra call of __get_user_pages. There are several places where get_user_pages is called inside a loop until all the pages requested are gotten or an error code is returned. Signed-off-by: Marco Stornelli <marco.stornelli@xxxxxxxxx> --- mm/memory.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index 494526a..cca14ed 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1858,7 +1858,7 @@ long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, if (ret & VM_FAULT_RETRY) { if (nonblocking) *nonblocking = 0; - return i; + return i ? i : -ERESTARTSYS; } /* -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html