Hello, I am not sure if it is a bug or not, but the output I got wasn't what I was looking for. And so looking for some help. I was looking to send pull request [1] to PM maintainer and was generating the request against his tree [2], which already has kernel upto v5.0-rc6 merged in it. These are my local branches: Branch A: 55538fbc79e9 cpufreq: qcom: Read voltage LUT and populate OPP f896d06665ec cpufreq: qcom-hw: Move to device_initcall 1c7fc5cbc339 (tag: v5.0-rc2) Linux 5.0-rc2 Branch B: a4f342b9607d PM / OPP: Introduce a power estimation helper 285881b51eb5 PM / OPP: Remove unused parameter of _generic_set_opp_clk_only() bfeffd155283 (tag: v5.0-rc1) Linux 5.0-rc1 pm/linux-next branch already has Branch B merged in it (with an earlier pull request). Branch C (7c139d3f0f99) is a merge of Branch A and Branch B. When I try to generate diff-stat with: git diff -M --stat pm/linux-next..7c139d3f0f99 It shows me the diffstat between v5.0-rc1..v5.0-rc2 as well. If I do git diff -M --stat v5.0-rc2..7c139d3f0f99 it shows only the files that have changed in patches in branch A and B. Since pm/linux-next already has Branch B and all the rcs upto rc6, I was expecting the output of first diffstat to be similar to second one (without branch B stuff). Is the expectation incorrect ? -- viresh [1] My tree: git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git [2] PM tree: git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git Top commit in PM tree at the time I was trying it: d26ff2405272 (pm/testing, pm/linux-next) Merge branch 'pm-opp' into linux-next