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[RFC,2/4] fs: task_mmu: Have the pagewalk avoid positive callback return codes

Message ID 20191010134058.11949-3-thomas_os@shipmail.org
State New, archived
Headers show
Series mm: pagewalk: Rework callback return values and optionally skip the pte level | expand

Commit Message

Thomas Hellström (Intel) Oct. 10, 2019, 1:40 p.m. UTC
From: Thomas Hellstrom <thellstrom@vmware.com>

The pagewalk code is being reworked to have positive callback return codes
mean "walk control". Avoid using positive return codes: "1" is replaced by
"-ENOBUFS".

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
---
 fs/proc/task_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 9442631fd4af..ef11969d9ba1 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1265,7 +1265,7 @@  struct pagemapread {
 #define PM_SWAP			BIT_ULL(62)
 #define PM_PRESENT		BIT_ULL(63)
 
-#define PM_END_OF_BUFFER    1
+#define PM_END_OF_BUFFER    (-ENOBUFS)
 
 static inline pagemap_entry_t make_pme(u64 frame, u64 flags)
 {